Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * dummy_hcd.c -- Dummy/Loopback USB host and device emulator driver. | |
3 | * | |
4 | * Maintainer: Alan Stern <stern@rowland.harvard.edu> | |
5 | * | |
6 | * Copyright (C) 2003 David Brownell | |
7 | * Copyright (C) 2003-2005 Alan Stern | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
1da177e4 LT |
13 | */ |
14 | ||
15 | ||
16 | /* | |
17 | * This exposes a device side "USB gadget" API, driven by requests to a | |
18 | * Linux-USB host controller driver. USB traffic is simulated; there's | |
19 | * no need for USB hardware. Use this with two other drivers: | |
20 | * | |
21 | * - Gadget driver, responding to requests (slave); | |
22 | * - Host-side device driver, as already familiar in Linux. | |
23 | * | |
24 | * Having this all in one kernel can help some stages of development, | |
25 | * bypassing some hardware (and driver) issues. UML could help too. | |
26 | */ | |
27 | ||
1da177e4 LT |
28 | #include <linux/module.h> |
29 | #include <linux/kernel.h> | |
30 | #include <linux/delay.h> | |
31 | #include <linux/ioport.h> | |
1da177e4 | 32 | #include <linux/slab.h> |
1da177e4 LT |
33 | #include <linux/errno.h> |
34 | #include <linux/init.h> | |
35 | #include <linux/timer.h> | |
36 | #include <linux/list.h> | |
37 | #include <linux/interrupt.h> | |
d052d1be | 38 | #include <linux/platform_device.h> |
1da177e4 | 39 | #include <linux/usb.h> |
9454a57a | 40 | #include <linux/usb/gadget.h> |
27729aad | 41 | #include <linux/usb/hcd.h> |
14fce33a | 42 | #include <linux/scatterlist.h> |
1da177e4 LT |
43 | |
44 | #include <asm/byteorder.h> | |
18f2cbaa | 45 | #include <linux/io.h> |
1da177e4 | 46 | #include <asm/irq.h> |
1da177e4 LT |
47 | #include <asm/unaligned.h> |
48 | ||
1da177e4 | 49 | #define DRIVER_DESC "USB Host+Gadget Emulator" |
391eca9d | 50 | #define DRIVER_VERSION "02 May 2005" |
1da177e4 | 51 | |
caf29f62 AS |
52 | #define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */ |
53 | ||
18f2cbaa SAS |
54 | static const char driver_name[] = "dummy_hcd"; |
55 | static const char driver_desc[] = "USB Host+Gadget Emulator"; | |
1da177e4 | 56 | |
18f2cbaa | 57 | static const char gadget_name[] = "dummy_udc"; |
1da177e4 | 58 | |
18f2cbaa SAS |
59 | MODULE_DESCRIPTION(DRIVER_DESC); |
60 | MODULE_AUTHOR("David Brownell"); | |
61 | MODULE_LICENSE("GPL"); | |
1da177e4 | 62 | |
1cd8fd28 TB |
63 | struct dummy_hcd_module_parameters { |
64 | bool is_super_speed; | |
7eca4c5a | 65 | bool is_high_speed; |
1cd8fd28 TB |
66 | }; |
67 | ||
68 | static struct dummy_hcd_module_parameters mod_data = { | |
7eca4c5a TB |
69 | .is_super_speed = false, |
70 | .is_high_speed = true, | |
1cd8fd28 TB |
71 | }; |
72 | module_param_named(is_super_speed, mod_data.is_super_speed, bool, S_IRUGO); | |
73 | MODULE_PARM_DESC(is_super_speed, "true to simulate SuperSpeed connection"); | |
7eca4c5a TB |
74 | module_param_named(is_high_speed, mod_data.is_high_speed, bool, S_IRUGO); |
75 | MODULE_PARM_DESC(is_high_speed, "true to simulate HighSpeed connection"); | |
1da177e4 LT |
76 | /*-------------------------------------------------------------------------*/ |
77 | ||
78 | /* gadget side driver data structres */ | |
79 | struct dummy_ep { | |
80 | struct list_head queue; | |
81 | unsigned long last_io; /* jiffies timestamp */ | |
82 | struct usb_gadget *gadget; | |
83 | const struct usb_endpoint_descriptor *desc; | |
84 | struct usb_ep ep; | |
18f2cbaa SAS |
85 | unsigned halted:1; |
86 | unsigned wedged:1; | |
87 | unsigned already_seen:1; | |
88 | unsigned setup_stage:1; | |
a54c979f | 89 | unsigned stream_en:1; |
1da177e4 LT |
90 | }; |
91 | ||
92 | struct dummy_request { | |
93 | struct list_head queue; /* ep's requests */ | |
94 | struct usb_request req; | |
95 | }; | |
96 | ||
18f2cbaa | 97 | static inline struct dummy_ep *usb_ep_to_dummy_ep(struct usb_ep *_ep) |
1da177e4 | 98 | { |
18f2cbaa | 99 | return container_of(_ep, struct dummy_ep, ep); |
1da177e4 LT |
100 | } |
101 | ||
102 | static inline struct dummy_request *usb_request_to_dummy_request | |
103 | (struct usb_request *_req) | |
104 | { | |
18f2cbaa | 105 | return container_of(_req, struct dummy_request, req); |
1da177e4 LT |
106 | } |
107 | ||
108 | /*-------------------------------------------------------------------------*/ | |
109 | ||
110 | /* | |
111 | * Every device has ep0 for control requests, plus up to 30 more endpoints, | |
112 | * in one of two types: | |
113 | * | |
114 | * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint | |
115 | * number can be changed. Names like "ep-a" are used for this type. | |
116 | * | |
117 | * - Fixed Function: in other cases. some characteristics may be mutable; | |
118 | * that'd be hardware-specific. Names like "ep12out-bulk" are used. | |
119 | * | |
120 | * Gadget drivers are responsible for not setting up conflicting endpoint | |
121 | * configurations, illegal or unsupported packet lengths, and so on. | |
122 | */ | |
123 | ||
18f2cbaa | 124 | static const char ep0name[] = "ep0"; |
1da177e4 | 125 | |
18f2cbaa | 126 | static const char *const ep_name[] = { |
1da177e4 LT |
127 | ep0name, /* everyone has ep0 */ |
128 | ||
129 | /* act like a net2280: high speed, six configurable endpoints */ | |
130 | "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f", | |
131 | ||
132 | /* or like pxa250: fifteen fixed function endpoints */ | |
133 | "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int", | |
134 | "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int", | |
135 | "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso", | |
136 | "ep15in-int", | |
137 | ||
138 | /* or like sa1100: two fixed function endpoints */ | |
139 | "ep1out-bulk", "ep2in-bulk", | |
140 | }; | |
52950ed4 | 141 | #define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name) |
1da177e4 | 142 | |
d9b76251 AS |
143 | /*-------------------------------------------------------------------------*/ |
144 | ||
1da177e4 LT |
145 | #define FIFO_SIZE 64 |
146 | ||
147 | struct urbp { | |
148 | struct urb *urb; | |
149 | struct list_head urbp_list; | |
14fce33a SAS |
150 | struct sg_mapping_iter miter; |
151 | u32 miter_started; | |
1da177e4 LT |
152 | }; |
153 | ||
391eca9d AS |
154 | |
155 | enum dummy_rh_state { | |
156 | DUMMY_RH_RESET, | |
157 | DUMMY_RH_SUSPENDED, | |
158 | DUMMY_RH_RUNNING | |
159 | }; | |
160 | ||
cdfcbd2c TB |
161 | struct dummy_hcd { |
162 | struct dummy *dum; | |
163 | enum dummy_rh_state rh_state; | |
164 | struct timer_list timer; | |
165 | u32 port_status; | |
166 | u32 old_status; | |
167 | unsigned long re_timeout; | |
168 | ||
169 | struct usb_device *udev; | |
170 | struct list_head urbp_list; | |
a54c979f SAS |
171 | u32 stream_en_ep; |
172 | u8 num_stream[30 / 2]; | |
cdfcbd2c TB |
173 | |
174 | unsigned active:1; | |
175 | unsigned old_active:1; | |
176 | unsigned resuming:1; | |
177 | }; | |
178 | ||
1da177e4 LT |
179 | struct dummy { |
180 | spinlock_t lock; | |
181 | ||
182 | /* | |
183 | * SLAVE/GADGET side support | |
184 | */ | |
18f2cbaa | 185 | struct dummy_ep ep[DUMMY_ENDPOINTS]; |
1da177e4 LT |
186 | int address; |
187 | struct usb_gadget gadget; | |
188 | struct usb_gadget_driver *driver; | |
189 | struct dummy_request fifo_req; | |
18f2cbaa | 190 | u8 fifo_buf[FIFO_SIZE]; |
1da177e4 | 191 | u16 devstatus; |
391eca9d | 192 | unsigned udc_suspended:1; |
f1c39fad | 193 | unsigned pullup:1; |
1da177e4 LT |
194 | |
195 | /* | |
196 | * MASTER/HOST side support | |
197 | */ | |
cdfcbd2c | 198 | struct dummy_hcd *hs_hcd; |
1cd8fd28 | 199 | struct dummy_hcd *ss_hcd; |
1da177e4 LT |
200 | }; |
201 | ||
cdfcbd2c | 202 | static inline struct dummy_hcd *hcd_to_dummy_hcd(struct usb_hcd *hcd) |
1da177e4 | 203 | { |
cdfcbd2c | 204 | return (struct dummy_hcd *) (hcd->hcd_priv); |
1da177e4 LT |
205 | } |
206 | ||
cdfcbd2c | 207 | static inline struct usb_hcd *dummy_hcd_to_hcd(struct dummy_hcd *dum) |
1da177e4 LT |
208 | { |
209 | return container_of((void *) dum, struct usb_hcd, hcd_priv); | |
210 | } | |
211 | ||
cdfcbd2c | 212 | static inline struct device *dummy_dev(struct dummy_hcd *dum) |
1da177e4 | 213 | { |
cdfcbd2c | 214 | return dummy_hcd_to_hcd(dum)->self.controller; |
1da177e4 LT |
215 | } |
216 | ||
18f2cbaa | 217 | static inline struct device *udc_dev(struct dummy *dum) |
d9b76251 AS |
218 | { |
219 | return dum->gadget.dev.parent; | |
220 | } | |
221 | ||
18f2cbaa | 222 | static inline struct dummy *ep_to_dummy(struct dummy_ep *ep) |
1da177e4 | 223 | { |
18f2cbaa | 224 | return container_of(ep->gadget, struct dummy, gadget); |
1da177e4 LT |
225 | } |
226 | ||
cdfcbd2c | 227 | static inline struct dummy_hcd *gadget_to_dummy_hcd(struct usb_gadget *gadget) |
1da177e4 | 228 | { |
cdfcbd2c | 229 | struct dummy *dum = container_of(gadget, struct dummy, gadget); |
1cd8fd28 TB |
230 | if (dum->gadget.speed == USB_SPEED_SUPER) |
231 | return dum->ss_hcd; | |
232 | else | |
233 | return dum->hs_hcd; | |
1da177e4 LT |
234 | } |
235 | ||
18f2cbaa | 236 | static inline struct dummy *gadget_dev_to_dummy(struct device *dev) |
1da177e4 | 237 | { |
18f2cbaa | 238 | return container_of(dev, struct dummy, gadget.dev); |
1da177e4 LT |
239 | } |
240 | ||
cdfcbd2c | 241 | static struct dummy the_controller; |
1da177e4 LT |
242 | |
243 | /*-------------------------------------------------------------------------*/ | |
244 | ||
f1c39fad AS |
245 | /* SLAVE/GADGET SIDE UTILITY ROUTINES */ |
246 | ||
247 | /* called with spinlock held */ | |
18f2cbaa | 248 | static void nuke(struct dummy *dum, struct dummy_ep *ep) |
f1c39fad | 249 | { |
18f2cbaa | 250 | while (!list_empty(&ep->queue)) { |
f1c39fad AS |
251 | struct dummy_request *req; |
252 | ||
18f2cbaa SAS |
253 | req = list_entry(ep->queue.next, struct dummy_request, queue); |
254 | list_del_init(&req->queue); | |
f1c39fad AS |
255 | req->req.status = -ESHUTDOWN; |
256 | ||
18f2cbaa SAS |
257 | spin_unlock(&dum->lock); |
258 | req->req.complete(&ep->ep, &req->req); | |
259 | spin_lock(&dum->lock); | |
f1c39fad AS |
260 | } |
261 | } | |
262 | ||
263 | /* caller must hold lock */ | |
18f2cbaa | 264 | static void stop_activity(struct dummy *dum) |
f1c39fad AS |
265 | { |
266 | struct dummy_ep *ep; | |
267 | ||
268 | /* prevent any more requests */ | |
269 | dum->address = 0; | |
270 | ||
271 | /* The timer is left running so that outstanding URBs can fail */ | |
272 | ||
273 | /* nuke any pending requests first, so driver i/o is quiesced */ | |
18f2cbaa SAS |
274 | list_for_each_entry(ep, &dum->gadget.ep_list, ep.ep_list) |
275 | nuke(dum, ep); | |
f1c39fad AS |
276 | |
277 | /* driver now does any non-usb quiescing necessary */ | |
278 | } | |
279 | ||
1cd8fd28 TB |
280 | /** |
281 | * set_link_state_by_speed() - Sets the current state of the link according to | |
282 | * the hcd speed | |
283 | * @dum_hcd: pointer to the dummy_hcd structure to update the link state for | |
284 | * | |
285 | * This function updates the port_status according to the link state and the | |
286 | * speed of the hcd. | |
287 | */ | |
288 | static void set_link_state_by_speed(struct dummy_hcd *dum_hcd) | |
289 | { | |
290 | struct dummy *dum = dum_hcd->dum; | |
291 | ||
292 | if (dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3) { | |
293 | if ((dum_hcd->port_status & USB_SS_PORT_STAT_POWER) == 0) { | |
294 | dum_hcd->port_status = 0; | |
295 | } else if (!dum->pullup || dum->udc_suspended) { | |
296 | /* UDC suspend must cause a disconnect */ | |
297 | dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION | | |
298 | USB_PORT_STAT_ENABLE); | |
299 | if ((dum_hcd->old_status & | |
300 | USB_PORT_STAT_CONNECTION) != 0) | |
301 | dum_hcd->port_status |= | |
302 | (USB_PORT_STAT_C_CONNECTION << 16); | |
303 | } else { | |
304 | /* device is connected and not suspended */ | |
305 | dum_hcd->port_status |= (USB_PORT_STAT_CONNECTION | | |
306 | USB_PORT_STAT_SPEED_5GBPS) ; | |
307 | if ((dum_hcd->old_status & | |
308 | USB_PORT_STAT_CONNECTION) == 0) | |
309 | dum_hcd->port_status |= | |
310 | (USB_PORT_STAT_C_CONNECTION << 16); | |
311 | if ((dum_hcd->port_status & | |
312 | USB_PORT_STAT_ENABLE) == 1 && | |
313 | (dum_hcd->port_status & | |
314 | USB_SS_PORT_LS_U0) == 1 && | |
315 | dum_hcd->rh_state != DUMMY_RH_SUSPENDED) | |
316 | dum_hcd->active = 1; | |
317 | } | |
318 | } else { | |
319 | if ((dum_hcd->port_status & USB_PORT_STAT_POWER) == 0) { | |
320 | dum_hcd->port_status = 0; | |
321 | } else if (!dum->pullup || dum->udc_suspended) { | |
322 | /* UDC suspend must cause a disconnect */ | |
323 | dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION | | |
324 | USB_PORT_STAT_ENABLE | | |
325 | USB_PORT_STAT_LOW_SPEED | | |
326 | USB_PORT_STAT_HIGH_SPEED | | |
327 | USB_PORT_STAT_SUSPEND); | |
328 | if ((dum_hcd->old_status & | |
329 | USB_PORT_STAT_CONNECTION) != 0) | |
330 | dum_hcd->port_status |= | |
331 | (USB_PORT_STAT_C_CONNECTION << 16); | |
332 | } else { | |
333 | dum_hcd->port_status |= USB_PORT_STAT_CONNECTION; | |
334 | if ((dum_hcd->old_status & | |
335 | USB_PORT_STAT_CONNECTION) == 0) | |
336 | dum_hcd->port_status |= | |
337 | (USB_PORT_STAT_C_CONNECTION << 16); | |
338 | if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0) | |
339 | dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND; | |
340 | else if ((dum_hcd->port_status & | |
341 | USB_PORT_STAT_SUSPEND) == 0 && | |
342 | dum_hcd->rh_state != DUMMY_RH_SUSPENDED) | |
343 | dum_hcd->active = 1; | |
344 | } | |
345 | } | |
346 | } | |
347 | ||
f1c39fad | 348 | /* caller must hold lock */ |
cdfcbd2c | 349 | static void set_link_state(struct dummy_hcd *dum_hcd) |
f1c39fad | 350 | { |
cdfcbd2c TB |
351 | struct dummy *dum = dum_hcd->dum; |
352 | ||
353 | dum_hcd->active = 0; | |
1cd8fd28 TB |
354 | if (dum->pullup) |
355 | if ((dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3 && | |
356 | dum->gadget.speed != USB_SPEED_SUPER) || | |
357 | (dummy_hcd_to_hcd(dum_hcd)->speed != HCD_USB3 && | |
358 | dum->gadget.speed == USB_SPEED_SUPER)) | |
359 | return; | |
360 | ||
361 | set_link_state_by_speed(dum_hcd); | |
f1c39fad | 362 | |
cdfcbd2c TB |
363 | if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0 || |
364 | dum_hcd->active) | |
365 | dum_hcd->resuming = 0; | |
f1c39fad | 366 | |
1cd8fd28 | 367 | /* if !connected or reset */ |
cdfcbd2c TB |
368 | if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0 || |
369 | (dum_hcd->port_status & USB_PORT_STAT_RESET) != 0) { | |
1cd8fd28 TB |
370 | /* |
371 | * We're connected and not reset (reset occurred now), | |
372 | * and driver attached - disconnect! | |
373 | */ | |
cdfcbd2c | 374 | if ((dum_hcd->old_status & USB_PORT_STAT_CONNECTION) != 0 && |
1cd8fd28 TB |
375 | (dum_hcd->old_status & USB_PORT_STAT_RESET) == 0 && |
376 | dum->driver) { | |
377 | stop_activity(dum); | |
378 | spin_unlock(&dum->lock); | |
379 | dum->driver->disconnect(&dum->gadget); | |
380 | spin_lock(&dum->lock); | |
f1c39fad | 381 | } |
cdfcbd2c TB |
382 | } else if (dum_hcd->active != dum_hcd->old_active) { |
383 | if (dum_hcd->old_active && dum->driver->suspend) { | |
1cd8fd28 TB |
384 | spin_unlock(&dum->lock); |
385 | dum->driver->suspend(&dum->gadget); | |
386 | spin_lock(&dum->lock); | |
387 | } else if (!dum_hcd->old_active && dum->driver->resume) { | |
388 | spin_unlock(&dum->lock); | |
389 | dum->driver->resume(&dum->gadget); | |
390 | spin_lock(&dum->lock); | |
f1c39fad AS |
391 | } |
392 | } | |
393 | ||
cdfcbd2c TB |
394 | dum_hcd->old_status = dum_hcd->port_status; |
395 | dum_hcd->old_active = dum_hcd->active; | |
f1c39fad AS |
396 | } |
397 | ||
398 | /*-------------------------------------------------------------------------*/ | |
399 | ||
1da177e4 LT |
400 | /* SLAVE/GADGET SIDE DRIVER |
401 | * | |
402 | * This only tracks gadget state. All the work is done when the host | |
403 | * side tries some (emulated) i/o operation. Real device controller | |
404 | * drivers would do real i/o using dma, fifos, irqs, timers, etc. | |
405 | */ | |
406 | ||
407 | #define is_enabled(dum) \ | |
408 | (dum->port_status & USB_PORT_STAT_ENABLE) | |
409 | ||
18f2cbaa SAS |
410 | static int dummy_enable(struct usb_ep *_ep, |
411 | const struct usb_endpoint_descriptor *desc) | |
1da177e4 LT |
412 | { |
413 | struct dummy *dum; | |
cdfcbd2c | 414 | struct dummy_hcd *dum_hcd; |
1da177e4 LT |
415 | struct dummy_ep *ep; |
416 | unsigned max; | |
417 | int retval; | |
418 | ||
18f2cbaa | 419 | ep = usb_ep_to_dummy_ep(_ep); |
1da177e4 LT |
420 | if (!_ep || !desc || ep->desc || _ep->name == ep0name |
421 | || desc->bDescriptorType != USB_DT_ENDPOINT) | |
422 | return -EINVAL; | |
18f2cbaa | 423 | dum = ep_to_dummy(ep); |
cdfcbd2c TB |
424 | if (!dum->driver) |
425 | return -ESHUTDOWN; | |
719e52cb SAS |
426 | |
427 | dum_hcd = gadget_to_dummy_hcd(&dum->gadget); | |
cdfcbd2c | 428 | if (!is_enabled(dum_hcd)) |
1da177e4 | 429 | return -ESHUTDOWN; |
cdfcbd2c TB |
430 | |
431 | /* | |
432 | * For HS/FS devices only bits 0..10 of the wMaxPacketSize represent the | |
433 | * maximum packet size. | |
1cd8fd28 | 434 | * For SS devices the wMaxPacketSize is limited by 1024. |
cdfcbd2c | 435 | */ |
29cc8897 | 436 | max = usb_endpoint_maxp(desc) & 0x7ff; |
1da177e4 LT |
437 | |
438 | /* drivers must not request bad settings, since lower levels | |
439 | * (hardware or its drivers) may not check. some endpoints | |
440 | * can't do iso, many have maxpacket limitations, etc. | |
441 | * | |
442 | * since this "hardware" driver is here to help debugging, we | |
443 | * have some extra sanity checks. (there could be more though, | |
444 | * especially for "ep9out" style fixed function ones.) | |
445 | */ | |
446 | retval = -EINVAL; | |
59f08e6d | 447 | switch (usb_endpoint_type(desc)) { |
1da177e4 | 448 | case USB_ENDPOINT_XFER_BULK: |
18f2cbaa SAS |
449 | if (strstr(ep->ep.name, "-iso") |
450 | || strstr(ep->ep.name, "-int")) { | |
1da177e4 LT |
451 | goto done; |
452 | } | |
453 | switch (dum->gadget.speed) { | |
1cd8fd28 TB |
454 | case USB_SPEED_SUPER: |
455 | if (max == 1024) | |
456 | break; | |
457 | goto done; | |
1da177e4 LT |
458 | case USB_SPEED_HIGH: |
459 | if (max == 512) | |
460 | break; | |
9063ff44 IL |
461 | goto done; |
462 | case USB_SPEED_FULL: | |
463 | if (max == 8 || max == 16 || max == 32 || max == 64) | |
1da177e4 LT |
464 | /* we'll fake any legal size */ |
465 | break; | |
9063ff44 IL |
466 | /* save a return statement */ |
467 | default: | |
468 | goto done; | |
1da177e4 LT |
469 | } |
470 | break; | |
471 | case USB_ENDPOINT_XFER_INT: | |
18f2cbaa | 472 | if (strstr(ep->ep.name, "-iso")) /* bulk is ok */ |
1da177e4 LT |
473 | goto done; |
474 | /* real hardware might not handle all packet sizes */ | |
475 | switch (dum->gadget.speed) { | |
1cd8fd28 | 476 | case USB_SPEED_SUPER: |
1da177e4 LT |
477 | case USB_SPEED_HIGH: |
478 | if (max <= 1024) | |
479 | break; | |
480 | /* save a return statement */ | |
481 | case USB_SPEED_FULL: | |
482 | if (max <= 64) | |
483 | break; | |
484 | /* save a return statement */ | |
485 | default: | |
486 | if (max <= 8) | |
487 | break; | |
488 | goto done; | |
489 | } | |
490 | break; | |
491 | case USB_ENDPOINT_XFER_ISOC: | |
18f2cbaa SAS |
492 | if (strstr(ep->ep.name, "-bulk") |
493 | || strstr(ep->ep.name, "-int")) | |
1da177e4 LT |
494 | goto done; |
495 | /* real hardware might not handle all packet sizes */ | |
496 | switch (dum->gadget.speed) { | |
1cd8fd28 | 497 | case USB_SPEED_SUPER: |
1da177e4 LT |
498 | case USB_SPEED_HIGH: |
499 | if (max <= 1024) | |
500 | break; | |
501 | /* save a return statement */ | |
502 | case USB_SPEED_FULL: | |
503 | if (max <= 1023) | |
504 | break; | |
505 | /* save a return statement */ | |
506 | default: | |
507 | goto done; | |
508 | } | |
509 | break; | |
510 | default: | |
511 | /* few chips support control except on ep0 */ | |
512 | goto done; | |
513 | } | |
514 | ||
515 | _ep->maxpacket = max; | |
a54c979f SAS |
516 | if (usb_ss_max_streams(_ep->comp_desc)) { |
517 | if (!usb_endpoint_xfer_bulk(desc)) { | |
518 | dev_err(udc_dev(dum), "Can't enable stream support on " | |
519 | "non-bulk ep %s\n", _ep->name); | |
520 | return -EINVAL; | |
521 | } | |
522 | ep->stream_en = 1; | |
523 | } | |
3cf0ad02 | 524 | ep->desc = desc; |
1da177e4 | 525 | |
a54c979f | 526 | dev_dbg(udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d stream %s\n", |
1da177e4 LT |
527 | _ep->name, |
528 | desc->bEndpointAddress & 0x0f, | |
529 | (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out", | |
530 | ({ char *val; | |
59f08e6d | 531 | switch (usb_endpoint_type(desc)) { |
7c884fe4 TB |
532 | case USB_ENDPOINT_XFER_BULK: |
533 | val = "bulk"; | |
534 | break; | |
535 | case USB_ENDPOINT_XFER_ISOC: | |
536 | val = "iso"; | |
537 | break; | |
538 | case USB_ENDPOINT_XFER_INT: | |
539 | val = "intr"; | |
540 | break; | |
541 | default: | |
542 | val = "ctrl"; | |
543 | break; | |
1da177e4 | 544 | }; val; }), |
a54c979f | 545 | max, ep->stream_en ? "enabled" : "disabled"); |
1da177e4 LT |
546 | |
547 | /* at this point real hardware should be NAKing transfers | |
548 | * to that endpoint, until a buffer is queued to it. | |
549 | */ | |
851a526d | 550 | ep->halted = ep->wedged = 0; |
1da177e4 LT |
551 | retval = 0; |
552 | done: | |
553 | return retval; | |
554 | } | |
555 | ||
18f2cbaa | 556 | static int dummy_disable(struct usb_ep *_ep) |
1da177e4 LT |
557 | { |
558 | struct dummy_ep *ep; | |
559 | struct dummy *dum; | |
560 | unsigned long flags; | |
561 | int retval; | |
562 | ||
18f2cbaa | 563 | ep = usb_ep_to_dummy_ep(_ep); |
1da177e4 LT |
564 | if (!_ep || !ep->desc || _ep->name == ep0name) |
565 | return -EINVAL; | |
18f2cbaa | 566 | dum = ep_to_dummy(ep); |
1da177e4 | 567 | |
18f2cbaa | 568 | spin_lock_irqsave(&dum->lock, flags); |
1da177e4 | 569 | ep->desc = NULL; |
a54c979f | 570 | ep->stream_en = 0; |
1da177e4 | 571 | retval = 0; |
18f2cbaa SAS |
572 | nuke(dum, ep); |
573 | spin_unlock_irqrestore(&dum->lock, flags); | |
1da177e4 | 574 | |
18f2cbaa | 575 | dev_dbg(udc_dev(dum), "disabled %s\n", _ep->name); |
1da177e4 LT |
576 | return retval; |
577 | } | |
578 | ||
18f2cbaa SAS |
579 | static struct usb_request *dummy_alloc_request(struct usb_ep *_ep, |
580 | gfp_t mem_flags) | |
1da177e4 LT |
581 | { |
582 | struct dummy_ep *ep; | |
583 | struct dummy_request *req; | |
584 | ||
585 | if (!_ep) | |
586 | return NULL; | |
18f2cbaa | 587 | ep = usb_ep_to_dummy_ep(_ep); |
1da177e4 | 588 | |
7039f422 | 589 | req = kzalloc(sizeof(*req), mem_flags); |
1da177e4 LT |
590 | if (!req) |
591 | return NULL; | |
18f2cbaa | 592 | INIT_LIST_HEAD(&req->queue); |
1da177e4 LT |
593 | return &req->req; |
594 | } | |
595 | ||
18f2cbaa | 596 | static void dummy_free_request(struct usb_ep *_ep, struct usb_request *_req) |
1da177e4 | 597 | { |
1da177e4 LT |
598 | struct dummy_request *req; |
599 | ||
f99987bb SAS |
600 | if (!_ep || !_req) { |
601 | __WARN(); | |
1da177e4 | 602 | return; |
f99987bb | 603 | } |
1da177e4 | 604 | |
18f2cbaa SAS |
605 | req = usb_request_to_dummy_request(_req); |
606 | WARN_ON(!list_empty(&req->queue)); | |
607 | kfree(req); | |
1da177e4 LT |
608 | } |
609 | ||
18f2cbaa | 610 | static void fifo_complete(struct usb_ep *ep, struct usb_request *req) |
1da177e4 LT |
611 | { |
612 | } | |
613 | ||
18f2cbaa | 614 | static int dummy_queue(struct usb_ep *_ep, struct usb_request *_req, |
55016f10 | 615 | gfp_t mem_flags) |
1da177e4 LT |
616 | { |
617 | struct dummy_ep *ep; | |
618 | struct dummy_request *req; | |
619 | struct dummy *dum; | |
cdfcbd2c | 620 | struct dummy_hcd *dum_hcd; |
1da177e4 LT |
621 | unsigned long flags; |
622 | ||
18f2cbaa SAS |
623 | req = usb_request_to_dummy_request(_req); |
624 | if (!_req || !list_empty(&req->queue) || !_req->complete) | |
1da177e4 LT |
625 | return -EINVAL; |
626 | ||
18f2cbaa | 627 | ep = usb_ep_to_dummy_ep(_ep); |
1da177e4 LT |
628 | if (!_ep || (!ep->desc && _ep->name != ep0name)) |
629 | return -EINVAL; | |
630 | ||
18f2cbaa | 631 | dum = ep_to_dummy(ep); |
719e52cb | 632 | dum_hcd = gadget_to_dummy_hcd(&dum->gadget); |
cdfcbd2c | 633 | if (!dum->driver || !is_enabled(dum_hcd)) |
1da177e4 LT |
634 | return -ESHUTDOWN; |
635 | ||
636 | #if 0 | |
18f2cbaa | 637 | dev_dbg(udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n", |
1da177e4 LT |
638 | ep, _req, _ep->name, _req->length, _req->buf); |
639 | #endif | |
1da177e4 LT |
640 | _req->status = -EINPROGRESS; |
641 | _req->actual = 0; | |
18f2cbaa | 642 | spin_lock_irqsave(&dum->lock, flags); |
1da177e4 LT |
643 | |
644 | /* implement an emulated single-request FIFO */ | |
645 | if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && | |
18f2cbaa SAS |
646 | list_empty(&dum->fifo_req.queue) && |
647 | list_empty(&ep->queue) && | |
1da177e4 LT |
648 | _req->length <= FIFO_SIZE) { |
649 | req = &dum->fifo_req; | |
650 | req->req = *_req; | |
651 | req->req.buf = dum->fifo_buf; | |
18f2cbaa | 652 | memcpy(dum->fifo_buf, _req->buf, _req->length); |
1da177e4 LT |
653 | req->req.context = dum; |
654 | req->req.complete = fifo_complete; | |
655 | ||
c728df70 | 656 | list_add_tail(&req->queue, &ep->queue); |
18f2cbaa | 657 | spin_unlock(&dum->lock); |
1da177e4 LT |
658 | _req->actual = _req->length; |
659 | _req->status = 0; | |
18f2cbaa SAS |
660 | _req->complete(_ep, _req); |
661 | spin_lock(&dum->lock); | |
c728df70 DB |
662 | } else |
663 | list_add_tail(&req->queue, &ep->queue); | |
18f2cbaa | 664 | spin_unlock_irqrestore(&dum->lock, flags); |
1da177e4 LT |
665 | |
666 | /* real hardware would likely enable transfers here, in case | |
667 | * it'd been left NAKing. | |
668 | */ | |
669 | return 0; | |
670 | } | |
671 | ||
18f2cbaa | 672 | static int dummy_dequeue(struct usb_ep *_ep, struct usb_request *_req) |
1da177e4 LT |
673 | { |
674 | struct dummy_ep *ep; | |
675 | struct dummy *dum; | |
676 | int retval = -EINVAL; | |
677 | unsigned long flags; | |
678 | struct dummy_request *req = NULL; | |
679 | ||
680 | if (!_ep || !_req) | |
681 | return retval; | |
18f2cbaa SAS |
682 | ep = usb_ep_to_dummy_ep(_ep); |
683 | dum = ep_to_dummy(ep); | |
1da177e4 LT |
684 | |
685 | if (!dum->driver) | |
686 | return -ESHUTDOWN; | |
687 | ||
18f2cbaa SAS |
688 | local_irq_save(flags); |
689 | spin_lock(&dum->lock); | |
690 | list_for_each_entry(req, &ep->queue, queue) { | |
1da177e4 | 691 | if (&req->req == _req) { |
18f2cbaa | 692 | list_del_init(&req->queue); |
1da177e4 LT |
693 | _req->status = -ECONNRESET; |
694 | retval = 0; | |
695 | break; | |
696 | } | |
697 | } | |
18f2cbaa | 698 | spin_unlock(&dum->lock); |
1da177e4 LT |
699 | |
700 | if (retval == 0) { | |
18f2cbaa | 701 | dev_dbg(udc_dev(dum), |
1da177e4 LT |
702 | "dequeued req %p from %s, len %d buf %p\n", |
703 | req, _ep->name, _req->length, _req->buf); | |
18f2cbaa | 704 | _req->complete(_ep, _req); |
1da177e4 | 705 | } |
18f2cbaa | 706 | local_irq_restore(flags); |
1da177e4 LT |
707 | return retval; |
708 | } | |
709 | ||
710 | static int | |
851a526d | 711 | dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) |
1da177e4 LT |
712 | { |
713 | struct dummy_ep *ep; | |
714 | struct dummy *dum; | |
715 | ||
716 | if (!_ep) | |
717 | return -EINVAL; | |
18f2cbaa SAS |
718 | ep = usb_ep_to_dummy_ep(_ep); |
719 | dum = ep_to_dummy(ep); | |
1da177e4 LT |
720 | if (!dum->driver) |
721 | return -ESHUTDOWN; | |
722 | if (!value) | |
851a526d | 723 | ep->halted = ep->wedged = 0; |
1da177e4 | 724 | else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && |
18f2cbaa | 725 | !list_empty(&ep->queue)) |
1da177e4 | 726 | return -EAGAIN; |
851a526d | 727 | else { |
1da177e4 | 728 | ep->halted = 1; |
851a526d AS |
729 | if (wedged) |
730 | ep->wedged = 1; | |
731 | } | |
1da177e4 LT |
732 | /* FIXME clear emulated data toggle too */ |
733 | return 0; | |
734 | } | |
735 | ||
851a526d AS |
736 | static int |
737 | dummy_set_halt(struct usb_ep *_ep, int value) | |
738 | { | |
739 | return dummy_set_halt_and_wedge(_ep, value, 0); | |
740 | } | |
741 | ||
742 | static int dummy_set_wedge(struct usb_ep *_ep) | |
743 | { | |
744 | if (!_ep || _ep->name == ep0name) | |
745 | return -EINVAL; | |
746 | return dummy_set_halt_and_wedge(_ep, 1, 1); | |
747 | } | |
748 | ||
1da177e4 LT |
749 | static const struct usb_ep_ops dummy_ep_ops = { |
750 | .enable = dummy_enable, | |
751 | .disable = dummy_disable, | |
752 | ||
753 | .alloc_request = dummy_alloc_request, | |
754 | .free_request = dummy_free_request, | |
755 | ||
1da177e4 LT |
756 | .queue = dummy_queue, |
757 | .dequeue = dummy_dequeue, | |
758 | ||
759 | .set_halt = dummy_set_halt, | |
851a526d | 760 | .set_wedge = dummy_set_wedge, |
1da177e4 LT |
761 | }; |
762 | ||
763 | /*-------------------------------------------------------------------------*/ | |
764 | ||
765 | /* there are both host and device side versions of this call ... */ | |
18f2cbaa | 766 | static int dummy_g_get_frame(struct usb_gadget *_gadget) |
1da177e4 LT |
767 | { |
768 | struct timeval tv; | |
769 | ||
18f2cbaa | 770 | do_gettimeofday(&tv); |
1da177e4 LT |
771 | return tv.tv_usec / 1000; |
772 | } | |
773 | ||
18f2cbaa | 774 | static int dummy_wakeup(struct usb_gadget *_gadget) |
1da177e4 | 775 | { |
cdfcbd2c | 776 | struct dummy_hcd *dum_hcd; |
1da177e4 | 777 | |
cdfcbd2c TB |
778 | dum_hcd = gadget_to_dummy_hcd(_gadget); |
779 | if (!(dum_hcd->dum->devstatus & ((1 << USB_DEVICE_B_HNP_ENABLE) | |
5742b0c9 | 780 | | (1 << USB_DEVICE_REMOTE_WAKEUP)))) |
1da177e4 | 781 | return -EINVAL; |
cdfcbd2c | 782 | if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0) |
391eca9d | 783 | return -ENOLINK; |
cdfcbd2c TB |
784 | if ((dum_hcd->port_status & USB_PORT_STAT_SUSPEND) == 0 && |
785 | dum_hcd->rh_state != DUMMY_RH_SUSPENDED) | |
391eca9d AS |
786 | return -EIO; |
787 | ||
788 | /* FIXME: What if the root hub is suspended but the port isn't? */ | |
1da177e4 LT |
789 | |
790 | /* hub notices our request, issues downstream resume, etc */ | |
cdfcbd2c TB |
791 | dum_hcd->resuming = 1; |
792 | dum_hcd->re_timeout = jiffies + msecs_to_jiffies(20); | |
793 | mod_timer(&dummy_hcd_to_hcd(dum_hcd)->rh_timer, dum_hcd->re_timeout); | |
1da177e4 LT |
794 | return 0; |
795 | } | |
796 | ||
18f2cbaa | 797 | static int dummy_set_selfpowered(struct usb_gadget *_gadget, int value) |
1da177e4 LT |
798 | { |
799 | struct dummy *dum; | |
800 | ||
18f2cbaa | 801 | dum = gadget_to_dummy_hcd(_gadget)->dum; |
1da177e4 LT |
802 | if (value) |
803 | dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED); | |
804 | else | |
805 | dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED); | |
806 | return 0; | |
807 | } | |
808 | ||
d262127c | 809 | static void dummy_udc_update_ep0(struct dummy *dum) |
b5738413 | 810 | { |
c6884191 | 811 | if (dum->gadget.speed == USB_SPEED_SUPER) |
b5738413 | 812 | dum->ep[0].ep.maxpacket = 9; |
c6884191 | 813 | else |
b5738413 | 814 | dum->ep[0].ep.maxpacket = 64; |
b5738413 SAS |
815 | } |
816 | ||
18f2cbaa | 817 | static int dummy_pullup(struct usb_gadget *_gadget, int value) |
f1c39fad | 818 | { |
d8a14a85 | 819 | struct dummy_hcd *dum_hcd; |
f1c39fad AS |
820 | struct dummy *dum; |
821 | unsigned long flags; | |
822 | ||
b5738413 SAS |
823 | dum = gadget_dev_to_dummy(&_gadget->dev); |
824 | ||
825 | if (value && dum->driver) { | |
826 | if (mod_data.is_super_speed) | |
7177aed4 | 827 | dum->gadget.speed = dum->driver->max_speed; |
b5738413 SAS |
828 | else if (mod_data.is_high_speed) |
829 | dum->gadget.speed = min_t(u8, USB_SPEED_HIGH, | |
7177aed4 | 830 | dum->driver->max_speed); |
b5738413 SAS |
831 | else |
832 | dum->gadget.speed = USB_SPEED_FULL; | |
d262127c | 833 | dummy_udc_update_ep0(dum); |
b5738413 | 834 | |
7177aed4 | 835 | if (dum->gadget.speed < dum->driver->max_speed) |
b5738413 | 836 | dev_dbg(udc_dev(dum), "This device can perform faster" |
7177aed4 MN |
837 | " if you connect it to a %s port...\n", |
838 | usb_speed_string(dum->driver->max_speed)); | |
b5738413 | 839 | } |
d8a14a85 | 840 | dum_hcd = gadget_to_dummy_hcd(_gadget); |
d8a14a85 | 841 | |
18f2cbaa | 842 | spin_lock_irqsave(&dum->lock, flags); |
f1c39fad | 843 | dum->pullup = (value != 0); |
d8a14a85 | 844 | set_link_state(dum_hcd); |
18f2cbaa | 845 | spin_unlock_irqrestore(&dum->lock, flags); |
b5738413 | 846 | |
d8a14a85 | 847 | usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd)); |
f1c39fad AS |
848 | return 0; |
849 | } | |
850 | ||
aa074739 SAS |
851 | static int dummy_udc_start(struct usb_gadget *g, |
852 | struct usb_gadget_driver *driver); | |
853 | static int dummy_udc_stop(struct usb_gadget *g, | |
854 | struct usb_gadget_driver *driver); | |
0f91349b | 855 | |
1da177e4 LT |
856 | static const struct usb_gadget_ops dummy_ops = { |
857 | .get_frame = dummy_g_get_frame, | |
858 | .wakeup = dummy_wakeup, | |
859 | .set_selfpowered = dummy_set_selfpowered, | |
f1c39fad | 860 | .pullup = dummy_pullup, |
aa074739 SAS |
861 | .udc_start = dummy_udc_start, |
862 | .udc_stop = dummy_udc_stop, | |
1da177e4 LT |
863 | }; |
864 | ||
865 | /*-------------------------------------------------------------------------*/ | |
866 | ||
867 | /* "function" sysfs attribute */ | |
18f2cbaa SAS |
868 | static ssize_t show_function(struct device *dev, struct device_attribute *attr, |
869 | char *buf) | |
1da177e4 | 870 | { |
18f2cbaa | 871 | struct dummy *dum = gadget_dev_to_dummy(dev); |
1da177e4 LT |
872 | |
873 | if (!dum->driver || !dum->driver->function) | |
874 | return 0; | |
18f2cbaa | 875 | return scnprintf(buf, PAGE_SIZE, "%s\n", dum->driver->function); |
1da177e4 | 876 | } |
18f2cbaa | 877 | static DEVICE_ATTR(function, S_IRUGO, show_function, NULL); |
1da177e4 LT |
878 | |
879 | /*-------------------------------------------------------------------------*/ | |
880 | ||
881 | /* | |
882 | * Driver registration/unregistration. | |
883 | * | |
884 | * This is basically hardware-specific; there's usually only one real USB | |
885 | * device (not host) controller since that's how USB devices are intended | |
886 | * to work. So most implementations of these api calls will rely on the | |
887 | * fact that only one driver will ever bind to the hardware. But curious | |
888 | * hardware can be built with discrete components, so the gadget API doesn't | |
889 | * require that assumption. | |
890 | * | |
891 | * For this emulator, it might be convenient to create a usb slave device | |
892 | * for each driver that registers: just add to a big root hub. | |
893 | */ | |
894 | ||
aa074739 SAS |
895 | static int dummy_udc_start(struct usb_gadget *g, |
896 | struct usb_gadget_driver *driver) | |
1da177e4 | 897 | { |
aa074739 SAS |
898 | struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g); |
899 | struct dummy *dum = dum_hcd->dum; | |
1da177e4 | 900 | |
7177aed4 | 901 | if (driver->max_speed == USB_SPEED_UNKNOWN) |
1da177e4 LT |
902 | return -EINVAL; |
903 | ||
904 | /* | |
905 | * SLAVE side init ... the layer above hardware, which | |
906 | * can't enumerate without help from the driver we're binding. | |
907 | */ | |
5742b0c9 | 908 | |
1da177e4 | 909 | dum->devstatus = 0; |
1da177e4 | 910 | |
1da177e4 | 911 | dum->driver = driver; |
18f2cbaa | 912 | dev_dbg(udc_dev(dum), "binding gadget driver '%s'\n", |
1da177e4 | 913 | driver->driver.name); |
1da177e4 LT |
914 | return 0; |
915 | } | |
1da177e4 | 916 | |
aa074739 SAS |
917 | static int dummy_udc_stop(struct usb_gadget *g, |
918 | struct usb_gadget_driver *driver) | |
1da177e4 | 919 | { |
aa074739 SAS |
920 | struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g); |
921 | struct dummy *dum = dum_hcd->dum; | |
1da177e4 | 922 | |
18f2cbaa | 923 | dev_dbg(udc_dev(dum), "unregister gadget driver '%s'\n", |
1da177e4 LT |
924 | driver->driver.name); |
925 | ||
1da177e4 | 926 | dum->driver = NULL; |
25427874 | 927 | |
1da177e4 LT |
928 | return 0; |
929 | } | |
1da177e4 LT |
930 | |
931 | #undef is_enabled | |
932 | ||
d9b76251 AS |
933 | /* The gadget structure is stored inside the hcd structure and will be |
934 | * released along with it. */ | |
18f2cbaa | 935 | static void dummy_gadget_release(struct device *dev) |
d9b76251 | 936 | { |
cdfcbd2c | 937 | return; |
d9b76251 AS |
938 | } |
939 | ||
0fb57599 SAS |
940 | static void init_dummy_udc_hw(struct dummy *dum) |
941 | { | |
942 | int i; | |
943 | ||
944 | INIT_LIST_HEAD(&dum->gadget.ep_list); | |
945 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { | |
946 | struct dummy_ep *ep = &dum->ep[i]; | |
947 | ||
948 | if (!ep_name[i]) | |
949 | break; | |
950 | ep->ep.name = ep_name[i]; | |
951 | ep->ep.ops = &dummy_ep_ops; | |
952 | list_add_tail(&ep->ep.ep_list, &dum->gadget.ep_list); | |
953 | ep->halted = ep->wedged = ep->already_seen = | |
954 | ep->setup_stage = 0; | |
955 | ep->ep.maxpacket = ~0; | |
c6884191 | 956 | ep->ep.max_streams = 16; |
0fb57599 SAS |
957 | ep->last_io = jiffies; |
958 | ep->gadget = &dum->gadget; | |
959 | ep->desc = NULL; | |
960 | INIT_LIST_HEAD(&ep->queue); | |
961 | } | |
962 | ||
963 | dum->gadget.ep0 = &dum->ep[0].ep; | |
964 | list_del_init(&dum->ep[0].ep.ep_list); | |
965 | INIT_LIST_HEAD(&dum->fifo_req.queue); | |
f8744d40 SAS |
966 | |
967 | #ifdef CONFIG_USB_OTG | |
968 | dum->gadget.is_otg = 1; | |
969 | #endif | |
0fb57599 SAS |
970 | } |
971 | ||
18f2cbaa | 972 | static int dummy_udc_probe(struct platform_device *pdev) |
d9b76251 | 973 | { |
cdfcbd2c | 974 | struct dummy *dum = &the_controller; |
d9b76251 AS |
975 | int rc; |
976 | ||
977 | dum->gadget.name = gadget_name; | |
978 | dum->gadget.ops = &dummy_ops; | |
d327ab5b | 979 | dum->gadget.max_speed = USB_SPEED_SUPER; |
d9b76251 | 980 | |
0031a06e | 981 | dev_set_name(&dum->gadget.dev, "gadget"); |
8364d6b0 | 982 | dum->gadget.dev.parent = &pdev->dev; |
d9b76251 | 983 | dum->gadget.dev.release = dummy_gadget_release; |
18f2cbaa | 984 | rc = device_register(&dum->gadget.dev); |
75d87cdf RR |
985 | if (rc < 0) { |
986 | put_device(&dum->gadget.dev); | |
d9b76251 | 987 | return rc; |
75d87cdf | 988 | } |
d9b76251 | 989 | |
0fb57599 SAS |
990 | init_dummy_udc_hw(dum); |
991 | ||
0f91349b SAS |
992 | rc = usb_add_gadget_udc(&pdev->dev, &dum->gadget); |
993 | if (rc < 0) | |
994 | goto err_udc; | |
995 | ||
18f2cbaa | 996 | rc = device_create_file(&dum->gadget.dev, &dev_attr_function); |
efd54a36 | 997 | if (rc < 0) |
0f91349b SAS |
998 | goto err_dev; |
999 | platform_set_drvdata(pdev, dum); | |
1000 | return rc; | |
1001 | ||
1002 | err_dev: | |
1003 | usb_del_gadget_udc(&dum->gadget); | |
1004 | err_udc: | |
1005 | device_unregister(&dum->gadget.dev); | |
d9b76251 AS |
1006 | return rc; |
1007 | } | |
1008 | ||
18f2cbaa | 1009 | static int dummy_udc_remove(struct platform_device *pdev) |
d9b76251 | 1010 | { |
18f2cbaa | 1011 | struct dummy *dum = platform_get_drvdata(pdev); |
d9b76251 | 1012 | |
0f91349b | 1013 | usb_del_gadget_udc(&dum->gadget); |
18f2cbaa SAS |
1014 | platform_set_drvdata(pdev, NULL); |
1015 | device_remove_file(&dum->gadget.dev, &dev_attr_function); | |
1016 | device_unregister(&dum->gadget.dev); | |
d9b76251 AS |
1017 | return 0; |
1018 | } | |
1019 | ||
fc0b721f SAS |
1020 | static void dummy_udc_pm(struct dummy *dum, struct dummy_hcd *dum_hcd, |
1021 | int suspend) | |
391eca9d | 1022 | { |
fc0b721f SAS |
1023 | spin_lock_irq(&dum->lock); |
1024 | dum->udc_suspended = suspend; | |
d8a14a85 | 1025 | set_link_state(dum_hcd); |
fc0b721f SAS |
1026 | spin_unlock_irq(&dum->lock); |
1027 | } | |
1028 | ||
1029 | static int dummy_udc_suspend(struct platform_device *pdev, pm_message_t state) | |
1030 | { | |
1031 | struct dummy *dum = platform_get_drvdata(pdev); | |
1032 | struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget); | |
391eca9d | 1033 | |
fc0b721f SAS |
1034 | dev_dbg(&pdev->dev, "%s\n", __func__); |
1035 | dummy_udc_pm(dum, dum_hcd, 1); | |
d8a14a85 | 1036 | usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd)); |
391eca9d AS |
1037 | return 0; |
1038 | } | |
1039 | ||
fc0b721f | 1040 | static int dummy_udc_resume(struct platform_device *pdev) |
391eca9d | 1041 | { |
fc0b721f SAS |
1042 | struct dummy *dum = platform_get_drvdata(pdev); |
1043 | struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget); | |
391eca9d | 1044 | |
fc0b721f SAS |
1045 | dev_dbg(&pdev->dev, "%s\n", __func__); |
1046 | dummy_udc_pm(dum, dum_hcd, 0); | |
d8a14a85 | 1047 | usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd)); |
391eca9d AS |
1048 | return 0; |
1049 | } | |
1050 | ||
3ae5eaec | 1051 | static struct platform_driver dummy_udc_driver = { |
d9b76251 AS |
1052 | .probe = dummy_udc_probe, |
1053 | .remove = dummy_udc_remove, | |
391eca9d AS |
1054 | .suspend = dummy_udc_suspend, |
1055 | .resume = dummy_udc_resume, | |
3ae5eaec RK |
1056 | .driver = { |
1057 | .name = (char *) gadget_name, | |
1058 | .owner = THIS_MODULE, | |
1059 | }, | |
d9b76251 AS |
1060 | }; |
1061 | ||
1da177e4 LT |
1062 | /*-------------------------------------------------------------------------*/ |
1063 | ||
a54c979f SAS |
1064 | static unsigned int dummy_get_ep_idx(const struct usb_endpoint_descriptor *desc) |
1065 | { | |
1066 | unsigned int index; | |
1067 | ||
1068 | index = usb_endpoint_num(desc) << 1; | |
1069 | if (usb_endpoint_dir_in(desc)) | |
1070 | index |= 1; | |
1071 | return index; | |
1072 | } | |
1073 | ||
1da177e4 LT |
1074 | /* MASTER/HOST SIDE DRIVER |
1075 | * | |
1076 | * this uses the hcd framework to hook up to host side drivers. | |
1077 | * its root hub will only have one device, otherwise it acts like | |
1078 | * a normal host controller. | |
1079 | * | |
1080 | * when urbs are queued, they're just stuck on a list that we | |
1081 | * scan in a timer callback. that callback connects writes from | |
1082 | * the host with reads from the device, and so on, based on the | |
1083 | * usb 2.0 rules. | |
1084 | */ | |
1085 | ||
a54c979f SAS |
1086 | static int dummy_ep_stream_en(struct dummy_hcd *dum_hcd, struct urb *urb) |
1087 | { | |
1088 | const struct usb_endpoint_descriptor *desc = &urb->ep->desc; | |
1089 | u32 index; | |
1090 | ||
1091 | if (!usb_endpoint_xfer_bulk(desc)) | |
1092 | return 0; | |
1093 | ||
1094 | index = dummy_get_ep_idx(desc); | |
1095 | return (1 << index) & dum_hcd->stream_en_ep; | |
1096 | } | |
1097 | ||
1098 | /* | |
1099 | * The max stream number is saved as a nibble so for the 30 possible endpoints | |
1100 | * we only 15 bytes of memory. Therefore we are limited to max 16 streams (0 | |
1101 | * means we use only 1 stream). The maximum according to the spec is 16bit so | |
1102 | * if the 16 stream limit is about to go, the array size should be incremented | |
1103 | * to 30 elements of type u16. | |
1104 | */ | |
1105 | static int get_max_streams_for_pipe(struct dummy_hcd *dum_hcd, | |
1106 | unsigned int pipe) | |
1107 | { | |
1108 | int max_streams; | |
1109 | ||
1110 | max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)]; | |
1111 | if (usb_pipeout(pipe)) | |
1112 | max_streams >>= 4; | |
1113 | else | |
1114 | max_streams &= 0xf; | |
1115 | max_streams++; | |
1116 | return max_streams; | |
1117 | } | |
1118 | ||
1119 | static void set_max_streams_for_pipe(struct dummy_hcd *dum_hcd, | |
1120 | unsigned int pipe, unsigned int streams) | |
1121 | { | |
1122 | int max_streams; | |
1123 | ||
1124 | streams--; | |
1125 | max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)]; | |
1126 | if (usb_pipeout(pipe)) { | |
1127 | streams <<= 4; | |
1128 | max_streams &= 0xf; | |
1129 | } else { | |
1130 | max_streams &= 0xf0; | |
1131 | } | |
1132 | max_streams |= streams; | |
1133 | dum_hcd->num_stream[usb_pipeendpoint(pipe)] = max_streams; | |
1134 | } | |
1135 | ||
1136 | static int dummy_validate_stream(struct dummy_hcd *dum_hcd, struct urb *urb) | |
1137 | { | |
1138 | unsigned int max_streams; | |
1139 | int enabled; | |
1140 | ||
1141 | enabled = dummy_ep_stream_en(dum_hcd, urb); | |
1142 | if (!urb->stream_id) { | |
1143 | if (enabled) | |
1144 | return -EINVAL; | |
1145 | return 0; | |
1146 | } | |
1147 | if (!enabled) | |
1148 | return -EINVAL; | |
1149 | ||
1150 | max_streams = get_max_streams_for_pipe(dum_hcd, | |
1151 | usb_pipeendpoint(urb->pipe)); | |
1152 | if (urb->stream_id > max_streams) { | |
1153 | dev_err(dummy_dev(dum_hcd), "Stream id %d is out of range.\n", | |
1154 | urb->stream_id); | |
1155 | BUG(); | |
1156 | return -EINVAL; | |
1157 | } | |
1158 | return 0; | |
1159 | } | |
1160 | ||
18f2cbaa | 1161 | static int dummy_urb_enqueue( |
1da177e4 | 1162 | struct usb_hcd *hcd, |
1da177e4 | 1163 | struct urb *urb, |
55016f10 | 1164 | gfp_t mem_flags |
1da177e4 | 1165 | ) { |
cdfcbd2c | 1166 | struct dummy_hcd *dum_hcd; |
1da177e4 LT |
1167 | struct urbp *urbp; |
1168 | unsigned long flags; | |
e9df41c5 | 1169 | int rc; |
1da177e4 | 1170 | |
18f2cbaa | 1171 | urbp = kmalloc(sizeof *urbp, mem_flags); |
1da177e4 LT |
1172 | if (!urbp) |
1173 | return -ENOMEM; | |
1174 | urbp->urb = urb; | |
14fce33a | 1175 | urbp->miter_started = 0; |
1da177e4 | 1176 | |
cdfcbd2c TB |
1177 | dum_hcd = hcd_to_dummy_hcd(hcd); |
1178 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); | |
a54c979f SAS |
1179 | |
1180 | rc = dummy_validate_stream(dum_hcd, urb); | |
1181 | if (rc) { | |
1182 | kfree(urbp); | |
1183 | goto done; | |
1184 | } | |
1185 | ||
e9df41c5 AS |
1186 | rc = usb_hcd_link_urb_to_ep(hcd, urb); |
1187 | if (rc) { | |
1188 | kfree(urbp); | |
1189 | goto done; | |
1190 | } | |
1da177e4 | 1191 | |
cdfcbd2c TB |
1192 | if (!dum_hcd->udev) { |
1193 | dum_hcd->udev = urb->dev; | |
1194 | usb_get_dev(dum_hcd->udev); | |
1195 | } else if (unlikely(dum_hcd->udev != urb->dev)) | |
1196 | dev_err(dummy_dev(dum_hcd), "usb_device address has changed!\n"); | |
1da177e4 | 1197 | |
cdfcbd2c | 1198 | list_add_tail(&urbp->urbp_list, &dum_hcd->urbp_list); |
1da177e4 | 1199 | urb->hcpriv = urbp; |
18f2cbaa | 1200 | if (usb_pipetype(urb->pipe) == PIPE_CONTROL) |
1da177e4 LT |
1201 | urb->error_count = 1; /* mark as a new urb */ |
1202 | ||
1203 | /* kick the scheduler, it'll do the rest */ | |
cdfcbd2c TB |
1204 | if (!timer_pending(&dum_hcd->timer)) |
1205 | mod_timer(&dum_hcd->timer, jiffies + 1); | |
1da177e4 | 1206 | |
e9df41c5 | 1207 | done: |
cdfcbd2c | 1208 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
e9df41c5 | 1209 | return rc; |
1da177e4 LT |
1210 | } |
1211 | ||
e9df41c5 | 1212 | static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
1da177e4 | 1213 | { |
cdfcbd2c | 1214 | struct dummy_hcd *dum_hcd; |
391eca9d | 1215 | unsigned long flags; |
e9df41c5 | 1216 | int rc; |
391eca9d AS |
1217 | |
1218 | /* giveback happens automatically in timer callback, | |
1219 | * so make sure the callback happens */ | |
cdfcbd2c TB |
1220 | dum_hcd = hcd_to_dummy_hcd(hcd); |
1221 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); | |
e9df41c5 AS |
1222 | |
1223 | rc = usb_hcd_check_unlink_urb(hcd, urb, status); | |
cdfcbd2c TB |
1224 | if (!rc && dum_hcd->rh_state != DUMMY_RH_RUNNING && |
1225 | !list_empty(&dum_hcd->urbp_list)) | |
1226 | mod_timer(&dum_hcd->timer, jiffies); | |
e9df41c5 | 1227 | |
cdfcbd2c | 1228 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
e9df41c5 | 1229 | return rc; |
1da177e4 LT |
1230 | } |
1231 | ||
a04ce20d SAS |
1232 | static int dummy_perform_transfer(struct urb *urb, struct dummy_request *req, |
1233 | u32 len) | |
1234 | { | |
1235 | void *ubuf, *rbuf; | |
14fce33a | 1236 | struct urbp *urbp = urb->hcpriv; |
a04ce20d | 1237 | int to_host; |
14fce33a SAS |
1238 | struct sg_mapping_iter *miter = &urbp->miter; |
1239 | u32 trans = 0; | |
1240 | u32 this_sg; | |
1241 | bool next_sg; | |
a04ce20d SAS |
1242 | |
1243 | to_host = usb_pipein(urb->pipe); | |
1244 | rbuf = req->req.buf + req->req.actual; | |
a04ce20d | 1245 | |
14fce33a SAS |
1246 | if (!urb->num_sgs) { |
1247 | ubuf = urb->transfer_buffer + urb->actual_length; | |
1248 | if (to_host) | |
1249 | memcpy(ubuf, rbuf, len); | |
1250 | else | |
1251 | memcpy(rbuf, ubuf, len); | |
1252 | return len; | |
1253 | } | |
1254 | ||
1255 | if (!urbp->miter_started) { | |
1256 | u32 flags = SG_MITER_ATOMIC; | |
1257 | ||
1258 | if (to_host) | |
1259 | flags |= SG_MITER_TO_SG; | |
1260 | else | |
1261 | flags |= SG_MITER_FROM_SG; | |
1262 | ||
1263 | sg_miter_start(miter, urb->sg, urb->num_sgs, flags); | |
1264 | urbp->miter_started = 1; | |
1265 | } | |
1266 | next_sg = sg_miter_next(miter); | |
1267 | if (next_sg == false) { | |
1268 | WARN_ON_ONCE(1); | |
1269 | return -EINVAL; | |
1270 | } | |
1271 | do { | |
1272 | ubuf = miter->addr; | |
1273 | this_sg = min_t(u32, len, miter->length); | |
1274 | miter->consumed = this_sg; | |
1275 | trans += this_sg; | |
1276 | ||
1277 | if (to_host) | |
1278 | memcpy(ubuf, rbuf, this_sg); | |
1279 | else | |
1280 | memcpy(rbuf, ubuf, this_sg); | |
1281 | len -= this_sg; | |
1282 | ||
1283 | if (!len) | |
1284 | break; | |
1285 | next_sg = sg_miter_next(miter); | |
1286 | if (next_sg == false) { | |
1287 | WARN_ON_ONCE(1); | |
1288 | return -EINVAL; | |
1289 | } | |
1290 | ||
1291 | rbuf += this_sg; | |
1292 | } while (1); | |
1293 | ||
1294 | sg_miter_stop(miter); | |
1295 | return trans; | |
a04ce20d SAS |
1296 | } |
1297 | ||
1da177e4 | 1298 | /* transfer up to a frame's worth; caller must own lock */ |
a54c979f SAS |
1299 | static int transfer(struct dummy_hcd *dum_hcd, struct urb *urb, |
1300 | struct dummy_ep *ep, int limit, int *status) | |
1da177e4 | 1301 | { |
a54c979f | 1302 | struct dummy *dum = dum_hcd->dum; |
1da177e4 LT |
1303 | struct dummy_request *req; |
1304 | ||
1305 | top: | |
1306 | /* if there's no request queued, the device is NAKing; return */ | |
18f2cbaa | 1307 | list_for_each_entry(req, &ep->queue, queue) { |
1da177e4 LT |
1308 | unsigned host_len, dev_len, len; |
1309 | int is_short, to_host; | |
1310 | int rescan = 0; | |
1311 | ||
a54c979f SAS |
1312 | if (dummy_ep_stream_en(dum_hcd, urb)) { |
1313 | if ((urb->stream_id != req->req.stream_id)) | |
1314 | continue; | |
1315 | } | |
1316 | ||
1da177e4 LT |
1317 | /* 1..N packets of ep->ep.maxpacket each ... the last one |
1318 | * may be short (including zero length). | |
1319 | * | |
1320 | * writer can send a zlp explicitly (length 0) or implicitly | |
1321 | * (length mod maxpacket zero, and 'zero' flag); they always | |
1322 | * terminate reads. | |
1323 | */ | |
1324 | host_len = urb->transfer_buffer_length - urb->actual_length; | |
1325 | dev_len = req->req.length - req->req.actual; | |
18f2cbaa | 1326 | len = min(host_len, dev_len); |
1da177e4 LT |
1327 | |
1328 | /* FIXME update emulated data toggle too */ | |
1329 | ||
18f2cbaa SAS |
1330 | to_host = usb_pipein(urb->pipe); |
1331 | if (unlikely(len == 0)) | |
1da177e4 LT |
1332 | is_short = 1; |
1333 | else { | |
1da177e4 LT |
1334 | /* not enough bandwidth left? */ |
1335 | if (limit < ep->ep.maxpacket && limit < len) | |
1336 | break; | |
18f2cbaa | 1337 | len = min_t(unsigned, len, limit); |
1da177e4 LT |
1338 | if (len == 0) |
1339 | break; | |
1340 | ||
1341 | /* use an extra pass for the final short packet */ | |
1342 | if (len > ep->ep.maxpacket) { | |
1343 | rescan = 1; | |
1344 | len -= (len % ep->ep.maxpacket); | |
1345 | } | |
1346 | is_short = (len % ep->ep.maxpacket) != 0; | |
1347 | ||
a04ce20d SAS |
1348 | len = dummy_perform_transfer(urb, req, len); |
1349 | ||
1da177e4 | 1350 | ep->last_io = jiffies; |
b1443ac0 | 1351 | if ((int)len < 0) { |
14fce33a SAS |
1352 | req->req.status = len; |
1353 | } else { | |
1354 | limit -= len; | |
1355 | urb->actual_length += len; | |
1356 | req->req.actual += len; | |
1357 | } | |
1da177e4 LT |
1358 | } |
1359 | ||
1360 | /* short packets terminate, maybe with overflow/underflow. | |
1361 | * it's only really an error to write too much. | |
1362 | * | |
1363 | * partially filling a buffer optionally blocks queue advances | |
1364 | * (so completion handlers can clean up the queue) but we don't | |
b0d9efba | 1365 | * need to emulate such data-in-flight. |
1da177e4 LT |
1366 | */ |
1367 | if (is_short) { | |
1368 | if (host_len == dev_len) { | |
1369 | req->req.status = 0; | |
4d2f110c | 1370 | *status = 0; |
1da177e4 LT |
1371 | } else if (to_host) { |
1372 | req->req.status = 0; | |
1373 | if (dev_len > host_len) | |
4d2f110c | 1374 | *status = -EOVERFLOW; |
1da177e4 | 1375 | else |
4d2f110c | 1376 | *status = 0; |
1da177e4 | 1377 | } else if (!to_host) { |
4d2f110c | 1378 | *status = 0; |
1da177e4 LT |
1379 | if (host_len > dev_len) |
1380 | req->req.status = -EOVERFLOW; | |
1381 | else | |
1382 | req->req.status = 0; | |
1383 | } | |
1384 | ||
1385 | /* many requests terminate without a short packet */ | |
1386 | } else { | |
1387 | if (req->req.length == req->req.actual | |
1388 | && !req->req.zero) | |
1389 | req->req.status = 0; | |
1390 | if (urb->transfer_buffer_length == urb->actual_length | |
1391 | && !(urb->transfer_flags | |
4d2f110c AS |
1392 | & URB_ZERO_PACKET)) |
1393 | *status = 0; | |
1da177e4 LT |
1394 | } |
1395 | ||
1396 | /* device side completion --> continuable */ | |
1397 | if (req->req.status != -EINPROGRESS) { | |
18f2cbaa | 1398 | list_del_init(&req->queue); |
1da177e4 | 1399 | |
18f2cbaa SAS |
1400 | spin_unlock(&dum->lock); |
1401 | req->req.complete(&ep->ep, &req->req); | |
1402 | spin_lock(&dum->lock); | |
1da177e4 LT |
1403 | |
1404 | /* requests might have been unlinked... */ | |
1405 | rescan = 1; | |
1406 | } | |
1407 | ||
1408 | /* host side completion --> terminate */ | |
4d2f110c | 1409 | if (*status != -EINPROGRESS) |
1da177e4 LT |
1410 | break; |
1411 | ||
1412 | /* rescan to continue with any other queued i/o */ | |
1413 | if (rescan) | |
1414 | goto top; | |
1415 | } | |
1416 | return limit; | |
1417 | } | |
1418 | ||
18f2cbaa | 1419 | static int periodic_bytes(struct dummy *dum, struct dummy_ep *ep) |
1da177e4 LT |
1420 | { |
1421 | int limit = ep->ep.maxpacket; | |
1422 | ||
1423 | if (dum->gadget.speed == USB_SPEED_HIGH) { | |
1424 | int tmp; | |
1425 | ||
1426 | /* high bandwidth mode */ | |
29cc8897 | 1427 | tmp = usb_endpoint_maxp(ep->desc); |
1da177e4 LT |
1428 | tmp = (tmp >> 11) & 0x03; |
1429 | tmp *= 8 /* applies to entire frame */; | |
1430 | limit += limit * tmp; | |
1431 | } | |
1cd8fd28 | 1432 | if (dum->gadget.speed == USB_SPEED_SUPER) { |
59f08e6d | 1433 | switch (usb_endpoint_type(ep->desc)) { |
1cd8fd28 TB |
1434 | case USB_ENDPOINT_XFER_ISOC: |
1435 | /* Sec. 4.4.8.2 USB3.0 Spec */ | |
1436 | limit = 3 * 16 * 1024 * 8; | |
1437 | break; | |
1438 | case USB_ENDPOINT_XFER_INT: | |
1439 | /* Sec. 4.4.7.2 USB3.0 Spec */ | |
1440 | limit = 3 * 1024 * 8; | |
1441 | break; | |
1442 | case USB_ENDPOINT_XFER_BULK: | |
1443 | default: | |
1444 | break; | |
1445 | } | |
1446 | } | |
1da177e4 LT |
1447 | return limit; |
1448 | } | |
1449 | ||
cdfcbd2c | 1450 | #define is_active(dum_hcd) ((dum_hcd->port_status & \ |
1da177e4 LT |
1451 | (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \ |
1452 | USB_PORT_STAT_SUSPEND)) \ | |
1453 | == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE)) | |
1454 | ||
18f2cbaa | 1455 | static struct dummy_ep *find_endpoint(struct dummy *dum, u8 address) |
1da177e4 LT |
1456 | { |
1457 | int i; | |
1458 | ||
1cd8fd28 TB |
1459 | if (!is_active((dum->gadget.speed == USB_SPEED_SUPER ? |
1460 | dum->ss_hcd : dum->hs_hcd))) | |
1da177e4 LT |
1461 | return NULL; |
1462 | if ((address & ~USB_DIR_IN) == 0) | |
18f2cbaa | 1463 | return &dum->ep[0]; |
1da177e4 | 1464 | for (i = 1; i < DUMMY_ENDPOINTS; i++) { |
18f2cbaa | 1465 | struct dummy_ep *ep = &dum->ep[i]; |
1da177e4 LT |
1466 | |
1467 | if (!ep->desc) | |
1468 | continue; | |
1469 | if (ep->desc->bEndpointAddress == address) | |
1470 | return ep; | |
1471 | } | |
1472 | return NULL; | |
1473 | } | |
1474 | ||
1475 | #undef is_active | |
1476 | ||
1477 | #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE) | |
1478 | #define Dev_InRequest (Dev_Request | USB_DIR_IN) | |
1479 | #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE) | |
1480 | #define Intf_InRequest (Intf_Request | USB_DIR_IN) | |
1481 | #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT) | |
1482 | #define Ep_InRequest (Ep_Request | USB_DIR_IN) | |
1483 | ||
8be8a9d3 TB |
1484 | |
1485 | /** | |
1486 | * handle_control_request() - handles all control transfers | |
1487 | * @dum: pointer to dummy (the_controller) | |
1488 | * @urb: the urb request to handle | |
1489 | * @setup: pointer to the setup data for a USB device control | |
1490 | * request | |
1491 | * @status: pointer to request handling status | |
1492 | * | |
1493 | * Return 0 - if the request was handled | |
1494 | * 1 - if the request wasn't handles | |
1495 | * error code on error | |
1496 | */ | |
cdfcbd2c | 1497 | static int handle_control_request(struct dummy_hcd *dum_hcd, struct urb *urb, |
8be8a9d3 TB |
1498 | struct usb_ctrlrequest *setup, |
1499 | int *status) | |
1500 | { | |
1501 | struct dummy_ep *ep2; | |
cdfcbd2c | 1502 | struct dummy *dum = dum_hcd->dum; |
8be8a9d3 TB |
1503 | int ret_val = 1; |
1504 | unsigned w_index; | |
1505 | unsigned w_value; | |
1506 | ||
1507 | w_index = le16_to_cpu(setup->wIndex); | |
1508 | w_value = le16_to_cpu(setup->wValue); | |
1509 | switch (setup->bRequest) { | |
1510 | case USB_REQ_SET_ADDRESS: | |
1511 | if (setup->bRequestType != Dev_Request) | |
1512 | break; | |
1513 | dum->address = w_value; | |
1514 | *status = 0; | |
1515 | dev_dbg(udc_dev(dum), "set_address = %d\n", | |
1516 | w_value); | |
1517 | ret_val = 0; | |
1518 | break; | |
1519 | case USB_REQ_SET_FEATURE: | |
1520 | if (setup->bRequestType == Dev_Request) { | |
1521 | ret_val = 0; | |
1522 | switch (w_value) { | |
1523 | case USB_DEVICE_REMOTE_WAKEUP: | |
1524 | break; | |
1525 | case USB_DEVICE_B_HNP_ENABLE: | |
1526 | dum->gadget.b_hnp_enable = 1; | |
1527 | break; | |
1528 | case USB_DEVICE_A_HNP_SUPPORT: | |
1529 | dum->gadget.a_hnp_support = 1; | |
1530 | break; | |
1531 | case USB_DEVICE_A_ALT_HNP_SUPPORT: | |
1532 | dum->gadget.a_alt_hnp_support = 1; | |
1533 | break; | |
1cd8fd28 TB |
1534 | case USB_DEVICE_U1_ENABLE: |
1535 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1536 | HCD_USB3) | |
1537 | w_value = USB_DEV_STAT_U1_ENABLED; | |
1538 | else | |
1539 | ret_val = -EOPNOTSUPP; | |
1540 | break; | |
1541 | case USB_DEVICE_U2_ENABLE: | |
1542 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1543 | HCD_USB3) | |
1544 | w_value = USB_DEV_STAT_U2_ENABLED; | |
1545 | else | |
1546 | ret_val = -EOPNOTSUPP; | |
1547 | break; | |
1548 | case USB_DEVICE_LTM_ENABLE: | |
1549 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1550 | HCD_USB3) | |
1551 | w_value = USB_DEV_STAT_LTM_ENABLED; | |
1552 | else | |
1553 | ret_val = -EOPNOTSUPP; | |
1554 | break; | |
8be8a9d3 TB |
1555 | default: |
1556 | ret_val = -EOPNOTSUPP; | |
1557 | } | |
1558 | if (ret_val == 0) { | |
1559 | dum->devstatus |= (1 << w_value); | |
1560 | *status = 0; | |
1561 | } | |
1562 | } else if (setup->bRequestType == Ep_Request) { | |
1563 | /* endpoint halt */ | |
1564 | ep2 = find_endpoint(dum, w_index); | |
1565 | if (!ep2 || ep2->ep.name == ep0name) { | |
1566 | ret_val = -EOPNOTSUPP; | |
1567 | break; | |
1568 | } | |
1569 | ep2->halted = 1; | |
1570 | ret_val = 0; | |
1571 | *status = 0; | |
1572 | } | |
1573 | break; | |
1574 | case USB_REQ_CLEAR_FEATURE: | |
1575 | if (setup->bRequestType == Dev_Request) { | |
1576 | ret_val = 0; | |
1577 | switch (w_value) { | |
1578 | case USB_DEVICE_REMOTE_WAKEUP: | |
1579 | w_value = USB_DEVICE_REMOTE_WAKEUP; | |
1580 | break; | |
1cd8fd28 TB |
1581 | case USB_DEVICE_U1_ENABLE: |
1582 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1583 | HCD_USB3) | |
1584 | w_value = USB_DEV_STAT_U1_ENABLED; | |
1585 | else | |
1586 | ret_val = -EOPNOTSUPP; | |
1587 | break; | |
1588 | case USB_DEVICE_U2_ENABLE: | |
1589 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1590 | HCD_USB3) | |
1591 | w_value = USB_DEV_STAT_U2_ENABLED; | |
1592 | else | |
1593 | ret_val = -EOPNOTSUPP; | |
1594 | break; | |
1595 | case USB_DEVICE_LTM_ENABLE: | |
1596 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1597 | HCD_USB3) | |
1598 | w_value = USB_DEV_STAT_LTM_ENABLED; | |
1599 | else | |
1600 | ret_val = -EOPNOTSUPP; | |
1601 | break; | |
8be8a9d3 TB |
1602 | default: |
1603 | ret_val = -EOPNOTSUPP; | |
1604 | break; | |
1605 | } | |
1606 | if (ret_val == 0) { | |
1607 | dum->devstatus &= ~(1 << w_value); | |
1608 | *status = 0; | |
1609 | } | |
1610 | } else if (setup->bRequestType == Ep_Request) { | |
1611 | /* endpoint halt */ | |
1612 | ep2 = find_endpoint(dum, w_index); | |
1613 | if (!ep2) { | |
1614 | ret_val = -EOPNOTSUPP; | |
1615 | break; | |
1616 | } | |
1617 | if (!ep2->wedged) | |
1618 | ep2->halted = 0; | |
1619 | ret_val = 0; | |
1620 | *status = 0; | |
1621 | } | |
1622 | break; | |
1623 | case USB_REQ_GET_STATUS: | |
1624 | if (setup->bRequestType == Dev_InRequest | |
1625 | || setup->bRequestType == Intf_InRequest | |
1626 | || setup->bRequestType == Ep_InRequest) { | |
1627 | char *buf; | |
1628 | /* | |
1629 | * device: remote wakeup, selfpowered | |
1630 | * interface: nothing | |
1631 | * endpoint: halt | |
1632 | */ | |
1633 | buf = (char *)urb->transfer_buffer; | |
1634 | if (urb->transfer_buffer_length > 0) { | |
1635 | if (setup->bRequestType == Ep_InRequest) { | |
1636 | ep2 = find_endpoint(dum, w_index); | |
1637 | if (!ep2) { | |
1638 | ret_val = -EOPNOTSUPP; | |
1639 | break; | |
1640 | } | |
1641 | buf[0] = ep2->halted; | |
1642 | } else if (setup->bRequestType == | |
1643 | Dev_InRequest) { | |
1644 | buf[0] = (u8)dum->devstatus; | |
1645 | } else | |
1646 | buf[0] = 0; | |
1647 | } | |
1648 | if (urb->transfer_buffer_length > 1) | |
1649 | buf[1] = 0; | |
1650 | urb->actual_length = min_t(u32, 2, | |
1651 | urb->transfer_buffer_length); | |
1652 | ret_val = 0; | |
1653 | *status = 0; | |
1654 | } | |
1655 | break; | |
1656 | } | |
1657 | return ret_val; | |
1658 | } | |
1659 | ||
1da177e4 LT |
1660 | /* drive both sides of the transfers; looks like irq handlers to |
1661 | * both drivers except the callbacks aren't in_irq(). | |
1662 | */ | |
cdfcbd2c | 1663 | static void dummy_timer(unsigned long _dum_hcd) |
1da177e4 | 1664 | { |
cdfcbd2c TB |
1665 | struct dummy_hcd *dum_hcd = (struct dummy_hcd *) _dum_hcd; |
1666 | struct dummy *dum = dum_hcd->dum; | |
1da177e4 LT |
1667 | struct urbp *urbp, *tmp; |
1668 | unsigned long flags; | |
1669 | int limit, total; | |
1670 | int i; | |
1671 | ||
1672 | /* simplistic model for one frame's bandwidth */ | |
1673 | switch (dum->gadget.speed) { | |
1674 | case USB_SPEED_LOW: | |
1675 | total = 8/*bytes*/ * 12/*packets*/; | |
1676 | break; | |
1677 | case USB_SPEED_FULL: | |
1678 | total = 64/*bytes*/ * 19/*packets*/; | |
1679 | break; | |
1680 | case USB_SPEED_HIGH: | |
1681 | total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/; | |
1682 | break; | |
1cd8fd28 TB |
1683 | case USB_SPEED_SUPER: |
1684 | /* Bus speed is 500000 bytes/ms, so use a little less */ | |
1685 | total = 490000; | |
1686 | break; | |
1da177e4 | 1687 | default: |
cdfcbd2c | 1688 | dev_err(dummy_dev(dum_hcd), "bogus device speed\n"); |
1da177e4 LT |
1689 | return; |
1690 | } | |
1691 | ||
1692 | /* FIXME if HZ != 1000 this will probably misbehave ... */ | |
1693 | ||
1694 | /* look at each urb queued by the host side driver */ | |
18f2cbaa | 1695 | spin_lock_irqsave(&dum->lock, flags); |
1da177e4 | 1696 | |
cdfcbd2c TB |
1697 | if (!dum_hcd->udev) { |
1698 | dev_err(dummy_dev(dum_hcd), | |
1da177e4 | 1699 | "timer fired with no URBs pending?\n"); |
18f2cbaa | 1700 | spin_unlock_irqrestore(&dum->lock, flags); |
1da177e4 LT |
1701 | return; |
1702 | } | |
1703 | ||
1704 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { | |
18f2cbaa | 1705 | if (!ep_name[i]) |
1da177e4 | 1706 | break; |
18f2cbaa | 1707 | dum->ep[i].already_seen = 0; |
1da177e4 LT |
1708 | } |
1709 | ||
1710 | restart: | |
cdfcbd2c | 1711 | list_for_each_entry_safe(urbp, tmp, &dum_hcd->urbp_list, urbp_list) { |
1da177e4 LT |
1712 | struct urb *urb; |
1713 | struct dummy_request *req; | |
1714 | u8 address; | |
1715 | struct dummy_ep *ep = NULL; | |
1716 | int type; | |
4d2f110c | 1717 | int status = -EINPROGRESS; |
1da177e4 LT |
1718 | |
1719 | urb = urbp->urb; | |
eb231054 | 1720 | if (urb->unlinked) |
1da177e4 | 1721 | goto return_urb; |
cdfcbd2c | 1722 | else if (dum_hcd->rh_state != DUMMY_RH_RUNNING) |
391eca9d | 1723 | continue; |
18f2cbaa | 1724 | type = usb_pipetype(urb->pipe); |
1da177e4 LT |
1725 | |
1726 | /* used up this frame's non-periodic bandwidth? | |
1727 | * FIXME there's infinite bandwidth for control and | |
1728 | * periodic transfers ... unrealistic. | |
1729 | */ | |
1730 | if (total <= 0 && type == PIPE_BULK) | |
1731 | continue; | |
1732 | ||
1733 | /* find the gadget's ep for this request (if configured) */ | |
1734 | address = usb_pipeendpoint (urb->pipe); | |
18f2cbaa | 1735 | if (usb_pipein(urb->pipe)) |
1da177e4 LT |
1736 | address |= USB_DIR_IN; |
1737 | ep = find_endpoint(dum, address); | |
1738 | if (!ep) { | |
1739 | /* set_configuration() disagreement */ | |
cdfcbd2c | 1740 | dev_dbg(dummy_dev(dum_hcd), |
1da177e4 LT |
1741 | "no ep configured for urb %p\n", |
1742 | urb); | |
4d2f110c | 1743 | status = -EPROTO; |
1da177e4 LT |
1744 | goto return_urb; |
1745 | } | |
1746 | ||
1747 | if (ep->already_seen) | |
1748 | continue; | |
1749 | ep->already_seen = 1; | |
18f2cbaa | 1750 | if (ep == &dum->ep[0] && urb->error_count) { |
1da177e4 LT |
1751 | ep->setup_stage = 1; /* a new urb */ |
1752 | urb->error_count = 0; | |
1753 | } | |
1754 | if (ep->halted && !ep->setup_stage) { | |
1755 | /* NOTE: must not be iso! */ | |
cdfcbd2c | 1756 | dev_dbg(dummy_dev(dum_hcd), "ep %s halted, urb %p\n", |
1da177e4 | 1757 | ep->ep.name, urb); |
4d2f110c | 1758 | status = -EPIPE; |
1da177e4 LT |
1759 | goto return_urb; |
1760 | } | |
1761 | /* FIXME make sure both ends agree on maxpacket */ | |
1762 | ||
1763 | /* handle control requests */ | |
18f2cbaa | 1764 | if (ep == &dum->ep[0] && ep->setup_stage) { |
1da177e4 LT |
1765 | struct usb_ctrlrequest setup; |
1766 | int value = 1; | |
1da177e4 | 1767 | |
18f2cbaa | 1768 | setup = *(struct usb_ctrlrequest *) urb->setup_packet; |
1da177e4 | 1769 | /* paranoia, in case of stale queued data */ |
18f2cbaa SAS |
1770 | list_for_each_entry(req, &ep->queue, queue) { |
1771 | list_del_init(&req->queue); | |
1da177e4 | 1772 | req->req.status = -EOVERFLOW; |
18f2cbaa | 1773 | dev_dbg(udc_dev(dum), "stale req = %p\n", |
1da177e4 LT |
1774 | req); |
1775 | ||
18f2cbaa SAS |
1776 | spin_unlock(&dum->lock); |
1777 | req->req.complete(&ep->ep, &req->req); | |
1778 | spin_lock(&dum->lock); | |
1da177e4 LT |
1779 | ep->already_seen = 0; |
1780 | goto restart; | |
1781 | } | |
1782 | ||
1783 | /* gadget driver never sees set_address or operations | |
1784 | * on standard feature flags. some hardware doesn't | |
1785 | * even expose them. | |
1786 | */ | |
1787 | ep->last_io = jiffies; | |
1788 | ep->setup_stage = 0; | |
1789 | ep->halted = 0; | |
1da177e4 | 1790 | |
cdfcbd2c | 1791 | value = handle_control_request(dum_hcd, urb, &setup, |
8be8a9d3 | 1792 | &status); |
1da177e4 LT |
1793 | |
1794 | /* gadget driver handles all other requests. block | |
1795 | * until setup() returns; no reentrancy issues etc. | |
1796 | */ | |
1797 | if (value > 0) { | |
18f2cbaa SAS |
1798 | spin_unlock(&dum->lock); |
1799 | value = dum->driver->setup(&dum->gadget, | |
1da177e4 | 1800 | &setup); |
18f2cbaa | 1801 | spin_lock(&dum->lock); |
1da177e4 LT |
1802 | |
1803 | if (value >= 0) { | |
1804 | /* no delays (max 64KB data stage) */ | |
1805 | limit = 64*1024; | |
1806 | goto treat_control_like_bulk; | |
1807 | } | |
1808 | /* error, see below */ | |
1809 | } | |
1810 | ||
1811 | if (value < 0) { | |
1812 | if (value != -EOPNOTSUPP) | |
18f2cbaa | 1813 | dev_dbg(udc_dev(dum), |
1da177e4 LT |
1814 | "setup --> %d\n", |
1815 | value); | |
4d2f110c | 1816 | status = -EPIPE; |
1da177e4 LT |
1817 | urb->actual_length = 0; |
1818 | } | |
1819 | ||
1820 | goto return_urb; | |
1821 | } | |
1822 | ||
1823 | /* non-control requests */ | |
1824 | limit = total; | |
18f2cbaa | 1825 | switch (usb_pipetype(urb->pipe)) { |
1da177e4 LT |
1826 | case PIPE_ISOCHRONOUS: |
1827 | /* FIXME is it urb->interval since the last xfer? | |
1828 | * use urb->iso_frame_desc[i]. | |
1829 | * complete whether or not ep has requests queued. | |
1830 | * report random errors, to debug drivers. | |
1831 | */ | |
18f2cbaa | 1832 | limit = max(limit, periodic_bytes(dum, ep)); |
4d2f110c | 1833 | status = -ENOSYS; |
1da177e4 LT |
1834 | break; |
1835 | ||
1836 | case PIPE_INTERRUPT: | |
1837 | /* FIXME is it urb->interval since the last xfer? | |
1838 | * this almost certainly polls too fast. | |
1839 | */ | |
18f2cbaa | 1840 | limit = max(limit, periodic_bytes(dum, ep)); |
1da177e4 LT |
1841 | /* FALLTHROUGH */ |
1842 | ||
1da177e4 | 1843 | default: |
18f2cbaa | 1844 | treat_control_like_bulk: |
1da177e4 | 1845 | ep->last_io = jiffies; |
a54c979f | 1846 | total = transfer(dum_hcd, urb, ep, limit, &status); |
1da177e4 LT |
1847 | break; |
1848 | } | |
1849 | ||
1850 | /* incomplete transfer? */ | |
4d2f110c | 1851 | if (status == -EINPROGRESS) |
1da177e4 LT |
1852 | continue; |
1853 | ||
1854 | return_urb: | |
18f2cbaa SAS |
1855 | list_del(&urbp->urbp_list); |
1856 | kfree(urbp); | |
1da177e4 LT |
1857 | if (ep) |
1858 | ep->already_seen = ep->setup_stage = 0; | |
1859 | ||
cdfcbd2c | 1860 | usb_hcd_unlink_urb_from_ep(dummy_hcd_to_hcd(dum_hcd), urb); |
18f2cbaa | 1861 | spin_unlock(&dum->lock); |
cdfcbd2c | 1862 | usb_hcd_giveback_urb(dummy_hcd_to_hcd(dum_hcd), urb, status); |
18f2cbaa | 1863 | spin_lock(&dum->lock); |
1da177e4 LT |
1864 | |
1865 | goto restart; | |
1866 | } | |
1867 | ||
cdfcbd2c TB |
1868 | if (list_empty(&dum_hcd->urbp_list)) { |
1869 | usb_put_dev(dum_hcd->udev); | |
1870 | dum_hcd->udev = NULL; | |
1871 | } else if (dum_hcd->rh_state == DUMMY_RH_RUNNING) { | |
391eca9d | 1872 | /* want a 1 msec delay here */ |
cdfcbd2c | 1873 | mod_timer(&dum_hcd->timer, jiffies + msecs_to_jiffies(1)); |
1da177e4 LT |
1874 | } |
1875 | ||
18f2cbaa | 1876 | spin_unlock_irqrestore(&dum->lock, flags); |
1da177e4 LT |
1877 | } |
1878 | ||
1879 | /*-------------------------------------------------------------------------*/ | |
1880 | ||
1881 | #define PORT_C_MASK \ | |
c2db8b5e AS |
1882 | ((USB_PORT_STAT_C_CONNECTION \ |
1883 | | USB_PORT_STAT_C_ENABLE \ | |
1884 | | USB_PORT_STAT_C_SUSPEND \ | |
1885 | | USB_PORT_STAT_C_OVERCURRENT \ | |
1886 | | USB_PORT_STAT_C_RESET) << 16) | |
1da177e4 | 1887 | |
18f2cbaa | 1888 | static int dummy_hub_status(struct usb_hcd *hcd, char *buf) |
1da177e4 | 1889 | { |
cdfcbd2c | 1890 | struct dummy_hcd *dum_hcd; |
1da177e4 | 1891 | unsigned long flags; |
391eca9d | 1892 | int retval = 0; |
1da177e4 | 1893 | |
cdfcbd2c | 1894 | dum_hcd = hcd_to_dummy_hcd(hcd); |
1da177e4 | 1895 | |
cdfcbd2c | 1896 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); |
541c7d43 | 1897 | if (!HCD_HW_ACCESSIBLE(hcd)) |
391eca9d | 1898 | goto done; |
f1c39fad | 1899 | |
cdfcbd2c TB |
1900 | if (dum_hcd->resuming && time_after_eq(jiffies, dum_hcd->re_timeout)) { |
1901 | dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); | |
1902 | dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND; | |
1903 | set_link_state(dum_hcd); | |
f1c39fad AS |
1904 | } |
1905 | ||
cdfcbd2c | 1906 | if ((dum_hcd->port_status & PORT_C_MASK) != 0) { |
1da177e4 | 1907 | *buf = (1 << 1); |
cdfcbd2c TB |
1908 | dev_dbg(dummy_dev(dum_hcd), "port status 0x%08x has changes\n", |
1909 | dum_hcd->port_status); | |
1da177e4 | 1910 | retval = 1; |
cdfcbd2c | 1911 | if (dum_hcd->rh_state == DUMMY_RH_SUSPENDED) |
18f2cbaa | 1912 | usb_hcd_resume_root_hub(hcd); |
1da177e4 | 1913 | } |
391eca9d | 1914 | done: |
cdfcbd2c | 1915 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
1da177e4 LT |
1916 | return retval; |
1917 | } | |
1918 | ||
1cd8fd28 TB |
1919 | static inline void |
1920 | ss_hub_descriptor(struct usb_hub_descriptor *desc) | |
1921 | { | |
1922 | memset(desc, 0, sizeof *desc); | |
1923 | desc->bDescriptorType = 0x2a; | |
1924 | desc->bDescLength = 12; | |
1925 | desc->wHubCharacteristics = cpu_to_le16(0x0001); | |
1926 | desc->bNbrPorts = 1; | |
1927 | desc->u.ss.bHubHdrDecLat = 0x04; /* Worst case: 0.4 micro sec*/ | |
1928 | desc->u.ss.DeviceRemovable = 0xffff; | |
1929 | } | |
1930 | ||
18f2cbaa | 1931 | static inline void hub_descriptor(struct usb_hub_descriptor *desc) |
1da177e4 | 1932 | { |
18f2cbaa | 1933 | memset(desc, 0, sizeof *desc); |
1da177e4 LT |
1934 | desc->bDescriptorType = 0x29; |
1935 | desc->bDescLength = 9; | |
fd05e720 | 1936 | desc->wHubCharacteristics = cpu_to_le16(0x0001); |
1da177e4 | 1937 | desc->bNbrPorts = 1; |
dbe79bbe JY |
1938 | desc->u.hs.DeviceRemovable[0] = 0xff; |
1939 | desc->u.hs.DeviceRemovable[1] = 0xff; | |
1da177e4 LT |
1940 | } |
1941 | ||
18f2cbaa | 1942 | static int dummy_hub_control( |
1da177e4 LT |
1943 | struct usb_hcd *hcd, |
1944 | u16 typeReq, | |
1945 | u16 wValue, | |
1946 | u16 wIndex, | |
1947 | char *buf, | |
1948 | u16 wLength | |
1949 | ) { | |
cdfcbd2c | 1950 | struct dummy_hcd *dum_hcd; |
1da177e4 LT |
1951 | int retval = 0; |
1952 | unsigned long flags; | |
1953 | ||
541c7d43 | 1954 | if (!HCD_HW_ACCESSIBLE(hcd)) |
391eca9d AS |
1955 | return -ETIMEDOUT; |
1956 | ||
cdfcbd2c TB |
1957 | dum_hcd = hcd_to_dummy_hcd(hcd); |
1958 | ||
1959 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); | |
1da177e4 LT |
1960 | switch (typeReq) { |
1961 | case ClearHubFeature: | |
1962 | break; | |
1963 | case ClearPortFeature: | |
1964 | switch (wValue) { | |
1965 | case USB_PORT_FEAT_SUSPEND: | |
1cd8fd28 TB |
1966 | if (hcd->speed == HCD_USB3) { |
1967 | dev_dbg(dummy_dev(dum_hcd), | |
1968 | "USB_PORT_FEAT_SUSPEND req not " | |
1969 | "supported for USB 3.0 roothub\n"); | |
1970 | goto error; | |
1971 | } | |
cdfcbd2c | 1972 | if (dum_hcd->port_status & USB_PORT_STAT_SUSPEND) { |
1da177e4 | 1973 | /* 20msec resume signaling */ |
cdfcbd2c TB |
1974 | dum_hcd->resuming = 1; |
1975 | dum_hcd->re_timeout = jiffies + | |
f1c39fad | 1976 | msecs_to_jiffies(20); |
1da177e4 LT |
1977 | } |
1978 | break; | |
1979 | case USB_PORT_FEAT_POWER: | |
1cd8fd28 TB |
1980 | if (hcd->speed == HCD_USB3) { |
1981 | if (dum_hcd->port_status & USB_PORT_STAT_POWER) | |
1982 | dev_dbg(dummy_dev(dum_hcd), | |
1983 | "power-off\n"); | |
1984 | } else | |
1985 | if (dum_hcd->port_status & | |
1986 | USB_SS_PORT_STAT_POWER) | |
1987 | dev_dbg(dummy_dev(dum_hcd), | |
1988 | "power-off\n"); | |
f1c39fad | 1989 | /* FALLS THROUGH */ |
1da177e4 | 1990 | default: |
cdfcbd2c TB |
1991 | dum_hcd->port_status &= ~(1 << wValue); |
1992 | set_link_state(dum_hcd); | |
1da177e4 LT |
1993 | } |
1994 | break; | |
1995 | case GetHubDescriptor: | |
1cd8fd28 TB |
1996 | if (hcd->speed == HCD_USB3 && |
1997 | (wLength < USB_DT_SS_HUB_SIZE || | |
1998 | wValue != (USB_DT_SS_HUB << 8))) { | |
1999 | dev_dbg(dummy_dev(dum_hcd), | |
2000 | "Wrong hub descriptor type for " | |
2001 | "USB 3.0 roothub.\n"); | |
2002 | goto error; | |
2003 | } | |
2004 | if (hcd->speed == HCD_USB3) | |
2005 | ss_hub_descriptor((struct usb_hub_descriptor *) buf); | |
2006 | else | |
2007 | hub_descriptor((struct usb_hub_descriptor *) buf); | |
1da177e4 LT |
2008 | break; |
2009 | case GetHubStatus: | |
18f2cbaa | 2010 | *(__le32 *) buf = cpu_to_le32(0); |
1da177e4 LT |
2011 | break; |
2012 | case GetPortStatus: | |
2013 | if (wIndex != 1) | |
2014 | retval = -EPIPE; | |
2015 | ||
2016 | /* whoever resets or resumes must GetPortStatus to | |
2017 | * complete it!! | |
2018 | */ | |
cdfcbd2c TB |
2019 | if (dum_hcd->resuming && |
2020 | time_after_eq(jiffies, dum_hcd->re_timeout)) { | |
2021 | dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); | |
2022 | dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND; | |
1da177e4 | 2023 | } |
cdfcbd2c TB |
2024 | if ((dum_hcd->port_status & USB_PORT_STAT_RESET) != 0 && |
2025 | time_after_eq(jiffies, dum_hcd->re_timeout)) { | |
2026 | dum_hcd->port_status |= (USB_PORT_STAT_C_RESET << 16); | |
2027 | dum_hcd->port_status &= ~USB_PORT_STAT_RESET; | |
2028 | if (dum_hcd->dum->pullup) { | |
2029 | dum_hcd->port_status |= USB_PORT_STAT_ENABLE; | |
1cd8fd28 TB |
2030 | |
2031 | if (hcd->speed < HCD_USB3) { | |
2032 | switch (dum_hcd->dum->gadget.speed) { | |
2033 | case USB_SPEED_HIGH: | |
2034 | dum_hcd->port_status |= | |
2035 | USB_PORT_STAT_HIGH_SPEED; | |
2036 | break; | |
2037 | case USB_SPEED_LOW: | |
2038 | dum_hcd->dum->gadget.ep0-> | |
2039 | maxpacket = 8; | |
2040 | dum_hcd->port_status |= | |
2041 | USB_PORT_STAT_LOW_SPEED; | |
2042 | break; | |
2043 | default: | |
2044 | dum_hcd->dum->gadget.speed = | |
2045 | USB_SPEED_FULL; | |
2046 | break; | |
2047 | } | |
1da177e4 LT |
2048 | } |
2049 | } | |
2050 | } | |
cdfcbd2c | 2051 | set_link_state(dum_hcd); |
18f2cbaa SAS |
2052 | ((__le16 *) buf)[0] = cpu_to_le16(dum_hcd->port_status); |
2053 | ((__le16 *) buf)[1] = cpu_to_le16(dum_hcd->port_status >> 16); | |
1da177e4 LT |
2054 | break; |
2055 | case SetHubFeature: | |
2056 | retval = -EPIPE; | |
2057 | break; | |
2058 | case SetPortFeature: | |
2059 | switch (wValue) { | |
1cd8fd28 TB |
2060 | case USB_PORT_FEAT_LINK_STATE: |
2061 | if (hcd->speed != HCD_USB3) { | |
2062 | dev_dbg(dummy_dev(dum_hcd), | |
2063 | "USB_PORT_FEAT_LINK_STATE req not " | |
2064 | "supported for USB 2.0 roothub\n"); | |
2065 | goto error; | |
2066 | } | |
2067 | /* | |
2068 | * Since this is dummy we don't have an actual link so | |
2069 | * there is nothing to do for the SET_LINK_STATE cmd | |
2070 | */ | |
2071 | break; | |
2072 | case USB_PORT_FEAT_U1_TIMEOUT: | |
2073 | case USB_PORT_FEAT_U2_TIMEOUT: | |
2074 | /* TODO: add suspend/resume support! */ | |
2075 | if (hcd->speed != HCD_USB3) { | |
2076 | dev_dbg(dummy_dev(dum_hcd), | |
2077 | "USB_PORT_FEAT_U1/2_TIMEOUT req not " | |
2078 | "supported for USB 2.0 roothub\n"); | |
2079 | goto error; | |
2080 | } | |
2081 | break; | |
1da177e4 | 2082 | case USB_PORT_FEAT_SUSPEND: |
1cd8fd28 TB |
2083 | /* Applicable only for USB2.0 hub */ |
2084 | if (hcd->speed == HCD_USB3) { | |
2085 | dev_dbg(dummy_dev(dum_hcd), | |
2086 | "USB_PORT_FEAT_SUSPEND req not " | |
2087 | "supported for USB 3.0 roothub\n"); | |
2088 | goto error; | |
2089 | } | |
cdfcbd2c TB |
2090 | if (dum_hcd->active) { |
2091 | dum_hcd->port_status |= USB_PORT_STAT_SUSPEND; | |
f1c39fad AS |
2092 | |
2093 | /* HNP would happen here; for now we | |
2094 | * assume b_bus_req is always true. | |
2095 | */ | |
cdfcbd2c | 2096 | set_link_state(dum_hcd); |
f1c39fad | 2097 | if (((1 << USB_DEVICE_B_HNP_ENABLE) |
cdfcbd2c TB |
2098 | & dum_hcd->dum->devstatus) != 0) |
2099 | dev_dbg(dummy_dev(dum_hcd), | |
5742b0c9 | 2100 | "no HNP yet!\n"); |
1da177e4 LT |
2101 | } |
2102 | break; | |
f1c39fad | 2103 | case USB_PORT_FEAT_POWER: |
1cd8fd28 TB |
2104 | if (hcd->speed == HCD_USB3) |
2105 | dum_hcd->port_status |= USB_SS_PORT_STAT_POWER; | |
2106 | else | |
2107 | dum_hcd->port_status |= USB_PORT_STAT_POWER; | |
cdfcbd2c | 2108 | set_link_state(dum_hcd); |
f1c39fad | 2109 | break; |
1cd8fd28 TB |
2110 | case USB_PORT_FEAT_BH_PORT_RESET: |
2111 | /* Applicable only for USB3.0 hub */ | |
2112 | if (hcd->speed != HCD_USB3) { | |
2113 | dev_dbg(dummy_dev(dum_hcd), | |
2114 | "USB_PORT_FEAT_BH_PORT_RESET req not " | |
2115 | "supported for USB 2.0 roothub\n"); | |
2116 | goto error; | |
2117 | } | |
2118 | /* FALLS THROUGH */ | |
1da177e4 | 2119 | case USB_PORT_FEAT_RESET: |
f1c39fad | 2120 | /* if it's already enabled, disable */ |
1cd8fd28 TB |
2121 | if (hcd->speed == HCD_USB3) { |
2122 | dum_hcd->port_status = 0; | |
2123 | dum_hcd->port_status = | |
2124 | (USB_SS_PORT_STAT_POWER | | |
2125 | USB_PORT_STAT_CONNECTION | | |
2126 | USB_PORT_STAT_RESET); | |
2127 | } else | |
2128 | dum_hcd->port_status &= ~(USB_PORT_STAT_ENABLE | |
f1c39fad AS |
2129 | | USB_PORT_STAT_LOW_SPEED |
2130 | | USB_PORT_STAT_HIGH_SPEED); | |
cdfcbd2c TB |
2131 | /* |
2132 | * We want to reset device status. All but the | |
2133 | * Self powered feature | |
2134 | */ | |
2135 | dum_hcd->dum->devstatus &= | |
2136 | (1 << USB_DEVICE_SELF_POWERED); | |
1cd8fd28 TB |
2137 | /* |
2138 | * FIXME USB3.0: what is the correct reset signaling | |
2139 | * interval? Is it still 50msec as for HS? | |
2140 | */ | |
cdfcbd2c | 2141 | dum_hcd->re_timeout = jiffies + msecs_to_jiffies(50); |
f1c39fad | 2142 | /* FALLS THROUGH */ |
1da177e4 | 2143 | default: |
1cd8fd28 TB |
2144 | if (hcd->speed == HCD_USB3) { |
2145 | if ((dum_hcd->port_status & | |
2146 | USB_SS_PORT_STAT_POWER) != 0) { | |
2147 | dum_hcd->port_status |= (1 << wValue); | |
2148 | set_link_state(dum_hcd); | |
2149 | } | |
2150 | } else | |
2151 | if ((dum_hcd->port_status & | |
2152 | USB_PORT_STAT_POWER) != 0) { | |
2153 | dum_hcd->port_status |= (1 << wValue); | |
2154 | set_link_state(dum_hcd); | |
2155 | } | |
2156 | } | |
2157 | break; | |
2158 | case GetPortErrorCount: | |
2159 | if (hcd->speed != HCD_USB3) { | |
2160 | dev_dbg(dummy_dev(dum_hcd), | |
2161 | "GetPortErrorCount req not " | |
2162 | "supported for USB 2.0 roothub\n"); | |
2163 | goto error; | |
2164 | } | |
2165 | /* We'll always return 0 since this is a dummy hub */ | |
2166 | *(__le32 *) buf = cpu_to_le32(0); | |
2167 | break; | |
2168 | case SetHubDepth: | |
2169 | if (hcd->speed != HCD_USB3) { | |
2170 | dev_dbg(dummy_dev(dum_hcd), | |
2171 | "SetHubDepth req not supported for " | |
2172 | "USB 2.0 roothub\n"); | |
2173 | goto error; | |
1da177e4 LT |
2174 | } |
2175 | break; | |
1da177e4 | 2176 | default: |
cdfcbd2c | 2177 | dev_dbg(dummy_dev(dum_hcd), |
1da177e4 LT |
2178 | "hub control req%04x v%04x i%04x l%d\n", |
2179 | typeReq, wValue, wIndex, wLength); | |
1cd8fd28 | 2180 | error: |
1da177e4 LT |
2181 | /* "protocol stall" on error */ |
2182 | retval = -EPIPE; | |
2183 | } | |
cdfcbd2c | 2184 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
685eb93f | 2185 | |
cdfcbd2c | 2186 | if ((dum_hcd->port_status & PORT_C_MASK) != 0) |
18f2cbaa | 2187 | usb_hcd_poll_rh_status(hcd); |
1da177e4 LT |
2188 | return retval; |
2189 | } | |
2190 | ||
18f2cbaa | 2191 | static int dummy_bus_suspend(struct usb_hcd *hcd) |
391eca9d | 2192 | { |
cdfcbd2c | 2193 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
391eca9d | 2194 | |
18f2cbaa | 2195 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); |
3cf0a22e | 2196 | |
cdfcbd2c TB |
2197 | spin_lock_irq(&dum_hcd->dum->lock); |
2198 | dum_hcd->rh_state = DUMMY_RH_SUSPENDED; | |
2199 | set_link_state(dum_hcd); | |
3cf0a22e | 2200 | hcd->state = HC_STATE_SUSPENDED; |
cdfcbd2c | 2201 | spin_unlock_irq(&dum_hcd->dum->lock); |
391eca9d AS |
2202 | return 0; |
2203 | } | |
2204 | ||
18f2cbaa | 2205 | static int dummy_bus_resume(struct usb_hcd *hcd) |
391eca9d | 2206 | { |
cdfcbd2c | 2207 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
3cf0a22e AS |
2208 | int rc = 0; |
2209 | ||
18f2cbaa | 2210 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); |
391eca9d | 2211 | |
cdfcbd2c | 2212 | spin_lock_irq(&dum_hcd->dum->lock); |
541c7d43 | 2213 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
cfa59dab | 2214 | rc = -ESHUTDOWN; |
3cf0a22e | 2215 | } else { |
cdfcbd2c TB |
2216 | dum_hcd->rh_state = DUMMY_RH_RUNNING; |
2217 | set_link_state(dum_hcd); | |
2218 | if (!list_empty(&dum_hcd->urbp_list)) | |
2219 | mod_timer(&dum_hcd->timer, jiffies); | |
3cf0a22e AS |
2220 | hcd->state = HC_STATE_RUNNING; |
2221 | } | |
cdfcbd2c | 2222 | spin_unlock_irq(&dum_hcd->dum->lock); |
3cf0a22e | 2223 | return rc; |
391eca9d | 2224 | } |
1da177e4 LT |
2225 | |
2226 | /*-------------------------------------------------------------------------*/ | |
2227 | ||
18f2cbaa | 2228 | static inline ssize_t show_urb(char *buf, size_t size, struct urb *urb) |
1da177e4 | 2229 | { |
18f2cbaa | 2230 | int ep = usb_pipeendpoint(urb->pipe); |
1da177e4 | 2231 | |
18f2cbaa | 2232 | return snprintf(buf, size, |
1da177e4 LT |
2233 | "urb/%p %s ep%d%s%s len %d/%d\n", |
2234 | urb, | |
2235 | ({ char *s; | |
18f2cbaa SAS |
2236 | switch (urb->dev->speed) { |
2237 | case USB_SPEED_LOW: | |
7c884fe4 TB |
2238 | s = "ls"; |
2239 | break; | |
18f2cbaa | 2240 | case USB_SPEED_FULL: |
7c884fe4 TB |
2241 | s = "fs"; |
2242 | break; | |
18f2cbaa | 2243 | case USB_SPEED_HIGH: |
7c884fe4 TB |
2244 | s = "hs"; |
2245 | break; | |
18f2cbaa | 2246 | case USB_SPEED_SUPER: |
1cd8fd28 TB |
2247 | s = "ss"; |
2248 | break; | |
18f2cbaa | 2249 | default: |
7c884fe4 TB |
2250 | s = "?"; |
2251 | break; | |
1da177e4 | 2252 | }; s; }), |
18f2cbaa | 2253 | ep, ep ? (usb_pipein(urb->pipe) ? "in" : "out") : "", |
1da177e4 | 2254 | ({ char *s; \ |
18f2cbaa SAS |
2255 | switch (usb_pipetype(urb->pipe)) { \ |
2256 | case PIPE_CONTROL: \ | |
7c884fe4 TB |
2257 | s = ""; \ |
2258 | break; \ | |
18f2cbaa | 2259 | case PIPE_BULK: \ |
7c884fe4 TB |
2260 | s = "-bulk"; \ |
2261 | break; \ | |
18f2cbaa | 2262 | case PIPE_INTERRUPT: \ |
7c884fe4 TB |
2263 | s = "-int"; \ |
2264 | break; \ | |
18f2cbaa | 2265 | default: \ |
7c884fe4 TB |
2266 | s = "-iso"; \ |
2267 | break; \ | |
18f2cbaa | 2268 | }; s; }), |
1da177e4 LT |
2269 | urb->actual_length, urb->transfer_buffer_length); |
2270 | } | |
2271 | ||
18f2cbaa SAS |
2272 | static ssize_t show_urbs(struct device *dev, struct device_attribute *attr, |
2273 | char *buf) | |
1da177e4 | 2274 | { |
18f2cbaa | 2275 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
cdfcbd2c | 2276 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
1da177e4 LT |
2277 | struct urbp *urbp; |
2278 | size_t size = 0; | |
2279 | unsigned long flags; | |
2280 | ||
cdfcbd2c TB |
2281 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); |
2282 | list_for_each_entry(urbp, &dum_hcd->urbp_list, urbp_list) { | |
1da177e4 LT |
2283 | size_t temp; |
2284 | ||
18f2cbaa | 2285 | temp = show_urb(buf, PAGE_SIZE - size, urbp->urb); |
1da177e4 LT |
2286 | buf += temp; |
2287 | size += temp; | |
2288 | } | |
cdfcbd2c | 2289 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
1da177e4 LT |
2290 | |
2291 | return size; | |
2292 | } | |
18f2cbaa | 2293 | static DEVICE_ATTR(urbs, S_IRUGO, show_urbs, NULL); |
1da177e4 | 2294 | |
1cd8fd28 TB |
2295 | static int dummy_start_ss(struct dummy_hcd *dum_hcd) |
2296 | { | |
2297 | init_timer(&dum_hcd->timer); | |
2298 | dum_hcd->timer.function = dummy_timer; | |
2299 | dum_hcd->timer.data = (unsigned long)dum_hcd; | |
2300 | dum_hcd->rh_state = DUMMY_RH_RUNNING; | |
a54c979f | 2301 | dum_hcd->stream_en_ep = 0; |
1cd8fd28 TB |
2302 | INIT_LIST_HEAD(&dum_hcd->urbp_list); |
2303 | dummy_hcd_to_hcd(dum_hcd)->power_budget = POWER_BUDGET; | |
2304 | dummy_hcd_to_hcd(dum_hcd)->state = HC_STATE_RUNNING; | |
2305 | dummy_hcd_to_hcd(dum_hcd)->uses_new_polling = 1; | |
2306 | #ifdef CONFIG_USB_OTG | |
2307 | dummy_hcd_to_hcd(dum_hcd)->self.otg_port = 1; | |
2308 | #endif | |
2309 | return 0; | |
2310 | ||
2311 | /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */ | |
2312 | return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs); | |
2313 | } | |
2314 | ||
cdfcbd2c | 2315 | static int dummy_start(struct usb_hcd *hcd) |
1da177e4 | 2316 | { |
cdfcbd2c | 2317 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
1da177e4 LT |
2318 | |
2319 | /* | |
2320 | * MASTER side init ... we emulate a root hub that'll only ever | |
2321 | * talk to one device (the slave side). Also appears in sysfs, | |
2322 | * just like more familiar pci-based HCDs. | |
2323 | */ | |
1cd8fd28 TB |
2324 | if (!usb_hcd_is_primary_hcd(hcd)) |
2325 | return dummy_start_ss(dum_hcd); | |
2326 | ||
cdfcbd2c TB |
2327 | spin_lock_init(&dum_hcd->dum->lock); |
2328 | init_timer(&dum_hcd->timer); | |
2329 | dum_hcd->timer.function = dummy_timer; | |
2330 | dum_hcd->timer.data = (unsigned long)dum_hcd; | |
2331 | dum_hcd->rh_state = DUMMY_RH_RUNNING; | |
1da177e4 | 2332 | |
cdfcbd2c | 2333 | INIT_LIST_HEAD(&dum_hcd->urbp_list); |
1da177e4 | 2334 | |
caf29f62 | 2335 | hcd->power_budget = POWER_BUDGET; |
1da177e4 | 2336 | hcd->state = HC_STATE_RUNNING; |
685eb93f | 2337 | hcd->uses_new_polling = 1; |
1da177e4 | 2338 | |
5742b0c9 AS |
2339 | #ifdef CONFIG_USB_OTG |
2340 | hcd->self.otg_port = 1; | |
2341 | #endif | |
2342 | ||
1da177e4 | 2343 | /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */ |
cdfcbd2c | 2344 | return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs); |
1da177e4 LT |
2345 | } |
2346 | ||
18f2cbaa | 2347 | static void dummy_stop(struct usb_hcd *hcd) |
1da177e4 LT |
2348 | { |
2349 | struct dummy *dum; | |
2350 | ||
18f2cbaa | 2351 | dum = hcd_to_dummy_hcd(hcd)->dum; |
cdfcbd2c TB |
2352 | device_remove_file(dummy_dev(hcd_to_dummy_hcd(hcd)), &dev_attr_urbs); |
2353 | usb_gadget_unregister_driver(dum->driver); | |
2354 | dev_info(dummy_dev(hcd_to_dummy_hcd(hcd)), "stopped\n"); | |
1da177e4 LT |
2355 | } |
2356 | ||
2357 | /*-------------------------------------------------------------------------*/ | |
2358 | ||
18f2cbaa | 2359 | static int dummy_h_get_frame(struct usb_hcd *hcd) |
1da177e4 | 2360 | { |
18f2cbaa | 2361 | return dummy_g_get_frame(NULL); |
1da177e4 LT |
2362 | } |
2363 | ||
cdfcbd2c TB |
2364 | static int dummy_setup(struct usb_hcd *hcd) |
2365 | { | |
14fce33a | 2366 | hcd->self.sg_tablesize = ~0; |
cdfcbd2c TB |
2367 | if (usb_hcd_is_primary_hcd(hcd)) { |
2368 | the_controller.hs_hcd = hcd_to_dummy_hcd(hcd); | |
2369 | the_controller.hs_hcd->dum = &the_controller; | |
1cd8fd28 TB |
2370 | /* |
2371 | * Mark the first roothub as being USB 2.0. | |
2372 | * The USB 3.0 roothub will be registered later by | |
2373 | * dummy_hcd_probe() | |
2374 | */ | |
cdfcbd2c TB |
2375 | hcd->speed = HCD_USB2; |
2376 | hcd->self.root_hub->speed = USB_SPEED_HIGH; | |
1cd8fd28 TB |
2377 | } else { |
2378 | the_controller.ss_hcd = hcd_to_dummy_hcd(hcd); | |
2379 | the_controller.ss_hcd->dum = &the_controller; | |
2380 | hcd->speed = HCD_USB3; | |
2381 | hcd->self.root_hub->speed = USB_SPEED_SUPER; | |
cdfcbd2c TB |
2382 | } |
2383 | return 0; | |
2384 | } | |
2385 | ||
1cd8fd28 | 2386 | /* Change a group of bulk endpoints to support multiple stream IDs */ |
d81f3e4f | 2387 | static int dummy_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev, |
1cd8fd28 TB |
2388 | struct usb_host_endpoint **eps, unsigned int num_eps, |
2389 | unsigned int num_streams, gfp_t mem_flags) | |
2390 | { | |
a54c979f SAS |
2391 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
2392 | unsigned long flags; | |
2393 | int max_stream; | |
2394 | int ret_streams = num_streams; | |
2395 | unsigned int index; | |
2396 | unsigned int i; | |
2397 | ||
2398 | if (!num_eps) | |
2399 | return -EINVAL; | |
2400 | ||
2401 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); | |
2402 | for (i = 0; i < num_eps; i++) { | |
2403 | index = dummy_get_ep_idx(&eps[i]->desc); | |
2404 | if ((1 << index) & dum_hcd->stream_en_ep) { | |
2405 | ret_streams = -EINVAL; | |
2406 | goto out; | |
2407 | } | |
2408 | max_stream = usb_ss_max_streams(&eps[i]->ss_ep_comp); | |
2409 | if (!max_stream) { | |
2410 | ret_streams = -EINVAL; | |
2411 | goto out; | |
2412 | } | |
2413 | if (max_stream < ret_streams) { | |
2414 | dev_dbg(dummy_dev(dum_hcd), "Ep 0x%x only supports %u " | |
2415 | "stream IDs.\n", | |
2416 | eps[i]->desc.bEndpointAddress, | |
2417 | max_stream); | |
2418 | ret_streams = max_stream; | |
2419 | } | |
2420 | } | |
2421 | ||
2422 | for (i = 0; i < num_eps; i++) { | |
2423 | index = dummy_get_ep_idx(&eps[i]->desc); | |
2424 | dum_hcd->stream_en_ep |= 1 << index; | |
2425 | set_max_streams_for_pipe(dum_hcd, | |
2426 | usb_endpoint_num(&eps[i]->desc), ret_streams); | |
2427 | } | |
2428 | out: | |
2429 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); | |
2430 | return ret_streams; | |
1cd8fd28 TB |
2431 | } |
2432 | ||
2433 | /* Reverts a group of bulk endpoints back to not using stream IDs. */ | |
d81f3e4f | 2434 | static int dummy_free_streams(struct usb_hcd *hcd, struct usb_device *udev, |
1cd8fd28 TB |
2435 | struct usb_host_endpoint **eps, unsigned int num_eps, |
2436 | gfp_t mem_flags) | |
2437 | { | |
a54c979f SAS |
2438 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
2439 | unsigned long flags; | |
2440 | int ret; | |
2441 | unsigned int index; | |
2442 | unsigned int i; | |
2443 | ||
2444 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); | |
2445 | for (i = 0; i < num_eps; i++) { | |
2446 | index = dummy_get_ep_idx(&eps[i]->desc); | |
2447 | if (!((1 << index) & dum_hcd->stream_en_ep)) { | |
2448 | ret = -EINVAL; | |
2449 | goto out; | |
2450 | } | |
2451 | } | |
2452 | ||
2453 | for (i = 0; i < num_eps; i++) { | |
2454 | index = dummy_get_ep_idx(&eps[i]->desc); | |
2455 | dum_hcd->stream_en_ep &= ~(1 << index); | |
2456 | set_max_streams_for_pipe(dum_hcd, | |
2457 | usb_endpoint_num(&eps[i]->desc), 0); | |
2458 | } | |
2459 | ret = 0; | |
2460 | out: | |
2461 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); | |
2462 | return ret; | |
1cd8fd28 TB |
2463 | } |
2464 | ||
2465 | static struct hc_driver dummy_hcd = { | |
1da177e4 LT |
2466 | .description = (char *) driver_name, |
2467 | .product_desc = "Dummy host controller", | |
cdfcbd2c | 2468 | .hcd_priv_size = sizeof(struct dummy_hcd), |
1da177e4 | 2469 | |
1cd8fd28 | 2470 | .flags = HCD_USB3 | HCD_SHARED, |
1da177e4 | 2471 | |
cdfcbd2c | 2472 | .reset = dummy_setup, |
1da177e4 LT |
2473 | .start = dummy_start, |
2474 | .stop = dummy_stop, | |
2475 | ||
18f2cbaa SAS |
2476 | .urb_enqueue = dummy_urb_enqueue, |
2477 | .urb_dequeue = dummy_urb_dequeue, | |
1da177e4 | 2478 | |
18f2cbaa | 2479 | .get_frame_number = dummy_h_get_frame, |
1da177e4 | 2480 | |
18f2cbaa SAS |
2481 | .hub_status_data = dummy_hub_status, |
2482 | .hub_control = dummy_hub_control, | |
0c0382e3 AS |
2483 | .bus_suspend = dummy_bus_suspend, |
2484 | .bus_resume = dummy_bus_resume, | |
1cd8fd28 TB |
2485 | |
2486 | .alloc_streams = dummy_alloc_streams, | |
2487 | .free_streams = dummy_free_streams, | |
1da177e4 LT |
2488 | }; |
2489 | ||
8364d6b0 | 2490 | static int dummy_hcd_probe(struct platform_device *pdev) |
1da177e4 | 2491 | { |
cdfcbd2c | 2492 | struct usb_hcd *hs_hcd; |
1cd8fd28 | 2493 | struct usb_hcd *ss_hcd; |
1da177e4 LT |
2494 | int retval; |
2495 | ||
8364d6b0 | 2496 | dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc); |
1da177e4 | 2497 | |
1cd8fd28 TB |
2498 | if (!mod_data.is_super_speed) |
2499 | dummy_hcd.flags = HCD_USB2; | |
cdfcbd2c TB |
2500 | hs_hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev)); |
2501 | if (!hs_hcd) | |
1da177e4 | 2502 | return -ENOMEM; |
cdfcbd2c | 2503 | hs_hcd->has_tt = 1; |
1da177e4 | 2504 | |
cdfcbd2c | 2505 | retval = usb_add_hcd(hs_hcd, 0, 0); |
1da177e4 | 2506 | if (retval != 0) { |
cdfcbd2c | 2507 | usb_put_hcd(hs_hcd); |
1cd8fd28 | 2508 | return retval; |
1da177e4 | 2509 | } |
1cd8fd28 TB |
2510 | |
2511 | if (mod_data.is_super_speed) { | |
2512 | ss_hcd = usb_create_shared_hcd(&dummy_hcd, &pdev->dev, | |
2513 | dev_name(&pdev->dev), hs_hcd); | |
2514 | if (!ss_hcd) { | |
2515 | retval = -ENOMEM; | |
2516 | goto dealloc_usb2_hcd; | |
2517 | } | |
2518 | ||
2519 | retval = usb_add_hcd(ss_hcd, 0, 0); | |
2520 | if (retval) | |
2521 | goto put_usb3_hcd; | |
2522 | } | |
2523 | return 0; | |
2524 | ||
2525 | put_usb3_hcd: | |
2526 | usb_put_hcd(ss_hcd); | |
2527 | dealloc_usb2_hcd: | |
2528 | usb_put_hcd(hs_hcd); | |
2529 | the_controller.hs_hcd = the_controller.ss_hcd = NULL; | |
1da177e4 LT |
2530 | return retval; |
2531 | } | |
2532 | ||
cdfcbd2c | 2533 | static int dummy_hcd_remove(struct platform_device *pdev) |
1da177e4 | 2534 | { |
cdfcbd2c TB |
2535 | struct dummy *dum; |
2536 | ||
18f2cbaa | 2537 | dum = hcd_to_dummy_hcd(platform_get_drvdata(pdev))->dum; |
1cd8fd28 TB |
2538 | |
2539 | if (dum->ss_hcd) { | |
2540 | usb_remove_hcd(dummy_hcd_to_hcd(dum->ss_hcd)); | |
2541 | usb_put_hcd(dummy_hcd_to_hcd(dum->ss_hcd)); | |
2542 | } | |
2543 | ||
cdfcbd2c TB |
2544 | usb_remove_hcd(dummy_hcd_to_hcd(dum->hs_hcd)); |
2545 | usb_put_hcd(dummy_hcd_to_hcd(dum->hs_hcd)); | |
1cd8fd28 | 2546 | |
cdfcbd2c | 2547 | the_controller.hs_hcd = NULL; |
1cd8fd28 | 2548 | the_controller.ss_hcd = NULL; |
1da177e4 | 2549 | |
d9b76251 | 2550 | return 0; |
1da177e4 LT |
2551 | } |
2552 | ||
18f2cbaa | 2553 | static int dummy_hcd_suspend(struct platform_device *pdev, pm_message_t state) |
391eca9d AS |
2554 | { |
2555 | struct usb_hcd *hcd; | |
cdfcbd2c | 2556 | struct dummy_hcd *dum_hcd; |
3cf0a22e | 2557 | int rc = 0; |
391eca9d | 2558 | |
18f2cbaa | 2559 | dev_dbg(&pdev->dev, "%s\n", __func__); |
391eca9d | 2560 | |
18f2cbaa | 2561 | hcd = platform_get_drvdata(pdev); |
cdfcbd2c TB |
2562 | dum_hcd = hcd_to_dummy_hcd(hcd); |
2563 | if (dum_hcd->rh_state == DUMMY_RH_RUNNING) { | |
3cf0a22e AS |
2564 | dev_warn(&pdev->dev, "Root hub isn't suspended!\n"); |
2565 | rc = -EBUSY; | |
2566 | } else | |
2567 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
2568 | return rc; | |
391eca9d AS |
2569 | } |
2570 | ||
18f2cbaa | 2571 | static int dummy_hcd_resume(struct platform_device *pdev) |
391eca9d AS |
2572 | { |
2573 | struct usb_hcd *hcd; | |
2574 | ||
18f2cbaa | 2575 | dev_dbg(&pdev->dev, "%s\n", __func__); |
391eca9d | 2576 | |
18f2cbaa | 2577 | hcd = platform_get_drvdata(pdev); |
3cf0a22e | 2578 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
18f2cbaa | 2579 | usb_hcd_poll_rh_status(hcd); |
391eca9d AS |
2580 | return 0; |
2581 | } | |
2582 | ||
3ae5eaec | 2583 | static struct platform_driver dummy_hcd_driver = { |
d9b76251 AS |
2584 | .probe = dummy_hcd_probe, |
2585 | .remove = dummy_hcd_remove, | |
391eca9d AS |
2586 | .suspend = dummy_hcd_suspend, |
2587 | .resume = dummy_hcd_resume, | |
3ae5eaec RK |
2588 | .driver = { |
2589 | .name = (char *) driver_name, | |
2590 | .owner = THIS_MODULE, | |
2591 | }, | |
d9b76251 | 2592 | }; |
1da177e4 | 2593 | |
d9b76251 | 2594 | /*-------------------------------------------------------------------------*/ |
1da177e4 | 2595 | |
a89a2cd3 AS |
2596 | static struct platform_device *the_udc_pdev; |
2597 | static struct platform_device *the_hcd_pdev; | |
1da177e4 | 2598 | |
18f2cbaa | 2599 | static int __init init(void) |
1da177e4 | 2600 | { |
a89a2cd3 | 2601 | int retval = -ENOMEM; |
1da177e4 | 2602 | |
18f2cbaa | 2603 | if (usb_disabled()) |
1da177e4 | 2604 | return -ENODEV; |
d9b76251 | 2605 | |
7eca4c5a TB |
2606 | if (!mod_data.is_high_speed && mod_data.is_super_speed) |
2607 | return -EINVAL; | |
2608 | ||
a89a2cd3 AS |
2609 | the_hcd_pdev = platform_device_alloc(driver_name, -1); |
2610 | if (!the_hcd_pdev) | |
1da177e4 | 2611 | return retval; |
a89a2cd3 AS |
2612 | the_udc_pdev = platform_device_alloc(gadget_name, -1); |
2613 | if (!the_udc_pdev) | |
2614 | goto err_alloc_udc; | |
d9b76251 | 2615 | |
a89a2cd3 AS |
2616 | retval = platform_driver_register(&dummy_hcd_driver); |
2617 | if (retval < 0) | |
2618 | goto err_register_hcd_driver; | |
2619 | retval = platform_driver_register(&dummy_udc_driver); | |
d9b76251 AS |
2620 | if (retval < 0) |
2621 | goto err_register_udc_driver; | |
2622 | ||
a89a2cd3 | 2623 | retval = platform_device_add(the_hcd_pdev); |
d9b76251 | 2624 | if (retval < 0) |
a89a2cd3 | 2625 | goto err_add_hcd; |
1cd8fd28 TB |
2626 | if (!the_controller.hs_hcd || |
2627 | (!the_controller.ss_hcd && mod_data.is_super_speed)) { | |
865835fa SAS |
2628 | /* |
2629 | * The hcd was added successfully but its probe function failed | |
2630 | * for some reason. | |
2631 | */ | |
2632 | retval = -EINVAL; | |
2633 | goto err_add_udc; | |
2634 | } | |
a89a2cd3 | 2635 | retval = platform_device_add(the_udc_pdev); |
d9b76251 | 2636 | if (retval < 0) |
a89a2cd3 | 2637 | goto err_add_udc; |
865835fa SAS |
2638 | if (!platform_get_drvdata(the_udc_pdev)) { |
2639 | /* | |
2640 | * The udc was added successfully but its probe function failed | |
2641 | * for some reason. | |
2642 | */ | |
2643 | retval = -EINVAL; | |
2644 | goto err_probe_udc; | |
2645 | } | |
d9b76251 AS |
2646 | return retval; |
2647 | ||
865835fa SAS |
2648 | err_probe_udc: |
2649 | platform_device_del(the_udc_pdev); | |
a89a2cd3 AS |
2650 | err_add_udc: |
2651 | platform_device_del(the_hcd_pdev); | |
2652 | err_add_hcd: | |
2653 | platform_driver_unregister(&dummy_udc_driver); | |
d9b76251 | 2654 | err_register_udc_driver: |
a89a2cd3 AS |
2655 | platform_driver_unregister(&dummy_hcd_driver); |
2656 | err_register_hcd_driver: | |
2657 | platform_device_put(the_udc_pdev); | |
2658 | err_alloc_udc: | |
2659 | platform_device_put(the_hcd_pdev); | |
1da177e4 LT |
2660 | return retval; |
2661 | } | |
18f2cbaa | 2662 | module_init(init); |
1da177e4 | 2663 | |
18f2cbaa | 2664 | static void __exit cleanup(void) |
1da177e4 | 2665 | { |
a89a2cd3 AS |
2666 | platform_device_unregister(the_udc_pdev); |
2667 | platform_device_unregister(the_hcd_pdev); | |
2668 | platform_driver_unregister(&dummy_udc_driver); | |
2669 | platform_driver_unregister(&dummy_hcd_driver); | |
1da177e4 | 2670 | } |
18f2cbaa | 2671 | module_exit(cleanup); |